Plant Guide
Letter "R"
Categories beginning with "R"
Entries beginning with "R"

Rafinesquia neomexicana


Common Name: desert chicory, New Mexico plumseed
Plant Type:
  • annual

USDA Hardiness Zones:
  • Not apply
0

Ramonda myconi


Common Name: Pyrenean Violet
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7

Winter Sowing Zones: None
0

Ramonda nathaliae


Common Name: Natalie's Ramonda
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7

Winter Sowing Zones: zones 6-8
0

Ramonda serbica


Common Name: Serbian Phoenix Flower
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7

Winter Sowing Zones: Zone 6-7
0

Ranunculus aconitifolius


Common Name: Bachelor's Buttons, Fair Maids of Kent
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zone 6-8
0

Ranunculus aconitifolius 'Flore Pleno'


Common Name: White bachelor's buttons, Fair Maids of Kent
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zone 5-8
0

Ranunculus acris


Common Name: Tall buttercup, Meadow buttercup
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
0

Ranunculus acris 'Farrer's Yellow'


Common Name: Farrer's Yellow Tall Buttercup, Meadow Buttercup
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 5-8
0

Ranunculus alpestris


Common Name: Alpine Buttercup
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zone 5-8
0

Ranunculus amplexicaulis


Common Name: Clasping Buttercup
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: 5 to 8
0

Ranunculus aquatilis


Common Name: White Water Crowfoot
Plant Type:
  • annual
  • aquatic

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zone 5-8
0

Ranunculus asiaticus


Common Name: Persian Buttercup
Plant Type:
  • bulb, tuber, corm

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: zone 7-8
0

Ranunculus asiaticus 'Bloomingdale Series'


Common Name: Bloomingdale Series Persian Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: zones 7-8
0

Ranunculus asiaticus 'Tecolote Mixed'


Common Name: Tecolote Mixed Persian Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: zones 7-8
0

Ranunculus asiaticus 'Turban Group'


Common Name: Turban Group Persian Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: zones 7-8
0

Ranunculus bulbosus


Common Name: Bulbous Buttercup, St. Anthony's Turnip
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zone 7-8
0

Ranunculus bullatus


Common Name: Autumn Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zone 6-8
0

Ranunculus calandrinioides


Common Name: High Alpine Buttercup
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 7-8
0

Ranunculus constantinopolitanus


Common Name: Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 7-8
0

Ranunculus constantiopolitanus 'Plenus'


Common Name: Plenus Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 7=8
0

Ranunculus crenatus


Common Name: High Alpine Buttercup
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7

Winter Sowing Zones: zone 5-7
0

Ranunculus ficaria


Common Name: Lesser Celandine, Pilewort, Woodland Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zone 5-8
0

Ranunculus ficaria 'Collarette'


Common Name: Collarette Lesser Celandine, Pilewort, Woodland Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 4-8
0

Ranunculus ficaria 'Cupreus'


Common Name: Cupreus Lesser Celandine, Pilewort, Woodland Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 4-8
0

Ranunculus ficaria f. albus


Common Name: Lesser Celandine, Pilewort, Woodland Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zone 4 -8
0

Ranunculus ficaria f. aurantiacus


Common Name: Lesser Celandine, Pilewort, Woodland Buttercup
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 5-8
0

Ranunculus ficaria 'Bowles Double'


Common Name: Bowles Double Lesser Celandine, Pilewort, Woodland Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 4-8
0

Ranunculus ficaria 'Brazen Hussy'


Common Name: Pilewort, Lesser Celandine
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
0

Ranunculus ficaria 'Double Bronze'


Common Name: Double Bronze Lesser Celandine, Pilewort, Woodland Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 4-8
0

Ranunculus ficaria 'Double Cream'


Common Name: Double Cream Lesser Celandine, Pilewort, Woodland Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 4-8
0

Ranunculus ficaria 'Double Mud'


Common Name: Double Mud Lesser Celandine, Pilewort, Woodland Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zone 4-8
0

Ranunculus ficaria 'Salmon's White'


Common Name: Salmon's White Lesser Celandine, Pilewort, Woodland Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 4-8
0

Ranunculus flammula


Common Name: Lesser Spearwort
Plant Type:
  • perennial
  • aquatic

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zone 5-8
0

Ranunculus gouanii 'Plenus'


Common Name: Plenus High Alpine Buttercup
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 7-8
0

Ranunculus gramineus


Common Name: Grassy-leaved Buttercup
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 6-8
0

Ranunculus insignis


Common Name: Alpine Ranunculus, Korikori, Kairy Alpine, Mountain Buttercup
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zone 8
0

Ranunculus lingua


Common Name: Greater Spearwort, Water Spearwort
Plant Type:
  • perennial
  • aquatic
  • herb

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 4-9
0

Ranunculus lyallii


Common Name: Giant Buttercup, Mount Cook Lily
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7

Winter Sowing Zones: zones 6-7
0

Ranunculus montanus 'Molten Gold'


Common Name: Molten Gold Alpine Ranunculus
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 4-8
0

Ranunculus parnassiifolius


Common Name: Parnassus Leaved Buttercup
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zone 5-8
0

Ranunculus repens 'Pleniflorus'


Common Name: Pleniflorus Double Creeping Buttercups
Plant Type:
  • perennial
  • vines and climbers

USDA Hardiness Zones:
  • -30 to -40ºF ZONE 3
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 3-8
0

Ranunculus 'Purple Heart'


Common Name: Purple Heart Ranunculus, Persian Buttercup
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11
0

Ranzania japonica


Plant Type:
  • bulb, tuber, corm
  • perennial
  • herb

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Raoulia australis


Common Name: New Zealand Scab Plant, Scabwort, Sheep Plant
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zone 8
0

Raoulia eximia


Common Name: Vegetable Sheep
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: None
0

Raoulia haastii


Common Name: Raoulia
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 7-8
0

Raoulia hookeri var. albosericea


Common Name: Scab Weed
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zone 8
0

Raoulia leontopodium


Common Name: North Ireland Edelweiss
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 7-8
0

Raoulia lutescens


Common Name: New Zealand Scab Plant, Scabwort, Sheep Plant
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zone 8
0

Raoulia x loganii


Plant Type:
  • perennial

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 7-8
0

Raphanus sativus


Common Name: Radish, Redish, Bier Radish, Dalkon
Plant Type:
  • fruits, vegetables

USDA Hardiness Zones:
  • -30 to -40ºF ZONE 3
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
0

Raphia farinifera


Common Name: Raphia Palm
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: None
0

Ratibida columnifera f. pulcherrima


Common Name: Mexican Hat, Prairie Coneflower
Plant Type:
  • annual
  • biennial
  • perennial

USDA Hardiness Zones:
  • -30 to -40ºF ZONE 3
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zones 3-8
0

Ratibida pinnata


Common Name: Gray-headed Coneflower, Pinnate Prairie Coneflower, Mexican Hat Plant
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -30 to -40ºF ZONE 3
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zones 3-8
0

Ravenala madagascariensis


Common Name: traveler's palm, traveler's tree
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11
0

Ravenea spp.


Common Name: Majesty (TM) Palm
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11
0

Rebutia aureiflora


Common Name: Golden-flowered Crown Cactus
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Rebutia fiebrigii


Common Name: Crown Cactus
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Rebutia heliosa


Common Name: Crown Cactus
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Rebutia krainziana


Common Name: Krainz' Crown Cactus, Gay Crown.
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Rebutia minuscula


Common Name: Fire Crown Cactus, Red Crown, Red Crown Cactus, Scarlet Crown Cactus, Violet Crown Cactus
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Rebutia neocumingii


Common Name: Crown Cactus
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Rebutia pulchra


Common Name: Crown Cactus
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Rebutia pygmaea


Common Name: Crown Cactus
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Rebutia rauschii


Common Name: Crown Cactus
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Rebutia senilis


Common Name: Crown Cactus
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Rebutia spegazziniana


Common Name: Crown Cactus
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Rebutia spinosissima


Common Name: Crown Cactus
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Rebutia tiraquensis


Common Name: Crown Cactus
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Rebutia violaciflora


Common Name: Violet-flowered Crown Cactus
Plant Type:
  • succulent and cactus

USDA Hardiness Zones:
  • 50 to 40ºF ZONE 11
  • 60 to 50ºF ZONE 12

Winter Sowing Zones: none
0

Red Pine Decline

0

Red thread on Turfgrass


Common Name: Red thread on Turfgrass
0

Rehderodendron macrocarpum


Common Name: Mu Gua Hong
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zone 8
0

Rehmannia angulata


Common Name: Chinese Foxglove
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: none
0

Rehmannia glutinosa


Common Name: Chinese Foxglove
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: none
0

Reinwardtia indica


Common Name: Yellow flax
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 60 to 50ºF ZONE 12
  • 70 to 60ºF ZONE 13
  • 80 to 70ºF ZONE 14

Winter Sowing Zones: none
0

Reinwardtia tetragyna


Common Name: Yellow Flax
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 60 to 50ºF ZONE 12
  • 70 to 60ºF ZONE 13
  • 80 to 70ºF ZONE 14

Winter Sowing Zones: none
0

Reinwardtia trigyna


Common Name: Yellow Flax
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 60 to 50ºF ZONE 12
  • 70 to 60ºF ZONE 13
  • 80 to 70ºF ZONE 14

Winter Sowing Zones: None
0

Reseda odorata


Common Name: Common Mignonette
Plant Type:
  • annual

USDA Hardiness Zones:
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: none
0

Retama monosperma


Common Name: Bridal Veil Broom
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: none
0

Rhamnus alaternus


Common Name: Italian Buckthorn, Mediterranean buckthorn
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 7-8
0

Rhamnus alaternus 'Argenteovariegata'


Common Name: Variegated Italian Buckthorn, Evergreen Buckthorn, Mediterranean Buckthorn
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 7-8
0

Rhamnus californica


Common Name: Coffeeberry
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 7-8
0

Rhamnus cathartica


Common Name: Common Buckthorn
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -30 to -40ºF ZONE 3
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
0

Rhamnus frangula


Common Name: Alder Buckthorn
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
0

Rhamnus frangula 'Asplenfolia'


Common Name: Asplenfolia Glossy Buckthorn, Alder Buckthorn, Fernleaf Buckthorn, or Tallhedge Buckthorn
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -30 to -40ºF ZONE 3
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zone 3-8
0

Rhamnus frangula 'Columnaris'


Common Name: Columnaris Tallhedge Buckhorn
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -30 to -40ºF ZONE 3
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7

Winter Sowing Zones: zones 3-7
0

Rhamnus imeretina


Common Name: Buckthorn
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 6-8
0

Rhaphiolepis delacourii


Common Name: Indian Hawthorn
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zone 8
0

Rhaphiolepis delacourii 'Coates' Crimson'


Common Name: Coates' Crimson Indian Hawthorn
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zone 8
0

Rhaphiolepis delacourii 'Enchantress'


Common Name: Enchantress Indian Hawthorn
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zone 8
0

Rhaphiolepis delacourii 'Indian Princess'


Common Name: Indian Princess Indian Hawthorn
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zone 8
0

Rhaphiolepis delacourii 'Spring Song'


Common Name: Spring Song Indian Hawthorn
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zone 8
0

Rhaphiolepis delacourii 'Springtime'


Common Name: Springtime Indian Hawthorn
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zone 8
0

Rhaphiolepis delacourii 'White Enchantress'


Common Name: White Enchantress Indian Hawthorn
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zone 8
0

Rhaphiolepis indica


Common Name: Pink Indian Hawthorn
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zone 8
0

Rhaphiolepis japonica


Common Name: Indian Hawthorn
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zone 8
0

Rhaphiolepis ovata


Common Name: Indian Hawthorn
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zone 8
0

Rhaphiolepis umbellata


Common Name: yeddo hawthorne, yedda hawthorne, Indian hawthorne
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11
0

Rhapidophyllum hystrix


Common Name: needle palm, porcupine palm
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
0

Rhapis excelsa


Common Name: Miniature Fan Palm, Broadleaf lady Palm
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: none
0

Rhapis excelsa 'Variegata'


Common Name: Variegated Lady Palm
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: none
0

Rhapis excelsa 'Zuikonishiki'


Common Name: Zuikonishiki Lady Palm
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: none
0

Rhapis flabelliformis


Common Name: Miniature Fan Palm
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: none
0

Rhapis humilis


Common Name: slender lady palm, dwarf lady palm
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11
0

Rheum alexandrae


Common Name: Alexander’s Rhubarb
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 6-8
0

Rheum australe


Common Name: Himalayan Rhubarb, Red -veined pie plant
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 5-8
0

Rheum emodii


Common Name: Himalayan Rhubarb, Red -veined pie plant
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 5-8
0

Rheum nobile


Common Name: Noble Rhubarb, Sikkim Rhubarb
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 6 to 8
0

Rheum palmatum


Common Name: Rhubarb, Chinese Rhubarb
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zone 5-8
0

Rheum palmatum 'Atropurpureum'


Common Name: Atrosanguineum Chinese Rhubarb
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Rheum palmatum 'Atrosanguineum'


Common Name: Atrosanguineum Chinese Rhubarb
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Rheum palmatum 'Bowles' Crimson'


Common Name: Bowles' Crimson Chinese Rhubarb
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Rheum palmatum 'Hadspen Crimson'


Common Name: Hadspen Crimson Chinese Rhubarb
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Rheum palmatum var tanguticum


Common Name: Chinese Rhubarb
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5 to 8
0

Rheum palmatum 'Irish Bronze'


Common Name: Irish Bronze Chinese Rhubarb
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5 to 8
0

Rheum 'Ace of Hearts'


Common Name: Ace of Hearts Rhubarb
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Rheum 'Ace of Spades'


Common Name: Ace of Spades Rhubarb
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Rhexia virginica


Common Name: Meadow Beauty
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 5-8
0

Rhipsalis grandiflora


Plant Type:
  • perennial
  • succulent and cactus
  • epiphyte, terrestrial

USDA Hardiness Zones:
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: none
0

Rhipsalis platycarpa


Common Name: Mistletoe Cactus, Jungle Cactus
Plant Type:
  • succulent and cactus
  • epiphyte, terrestrial

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: none
0

Rhipsalis teres f. capilliformis


Common Name: Link Cactus, Old Man's Beard
Plant Type:
  • succulent and cactus
  • epiphyte, terrestrial

USDA Hardiness Zones:
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: none
0

Rhizoctonia spp.


Common Name: Brown Patch
0

Rhodanthe chlorocephala subsp. rosea


Common Name: Strawflower, Everlasting Daisy, Paper Daisy
Plant Type:
  • annual

Winter Sowing Zones: none
0

Rhodanthe manglesii


Common Name: Swan River Everlasting, Strawflower
Plant Type:
  • annual

Winter Sowing Zones: None
0

Rhodanthemum atlanticum


Common Name: Chrysanthemum
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: none
0

Rhodanthemum catananche


Common Name: Chrysanthemum
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: none
0

Rhodanthemum gayanum


Common Name: Aster
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: none
0

Rhodanthemum hosmariense


Common Name: Moroccan Daisy
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: none
0

Rhodanthemum maresii


Common Name: Chrysanthemum
Plant Type:
  • perennial

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: none
0

Rhodiola heterodonta


Common Name: Toothed Rhodiola
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Rhodiola rosea


Common Name: Golden Root, Rose Root, Roseroot, Aaron's Rod, Arctic Root, King's Crown, Orpin rose
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zone 4-8
0

Rhodiola wallichiana


Plant Type:
  • perennial

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 6-8
0

Rhodochiton atrosanguineus


Common Name: Purple Bell Vine
Plant Type:
  • annual
  • perennial
  • vines and climbers

USDA Hardiness Zones:
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: none
0

Rhodochiton volubile


Common Name: Purple Bell Vine
Plant Type:
  • annual
  • perennial
  • vines and climbers

USDA Hardiness Zones:
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: none
0

Rhododendron austrinum


Common Name: Florida flame azalea, flame azalea, deciduous azalea
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zones 6-8
0

Rhododendron calendulaceum


Common Name: Flame Azalea
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
0

Rhododendron canescens


Common Name: Mountain Azalea, Pinxter Azalea, Piedmont Azalea, Wild Azalea, Bush Honeysuckle
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 6-8
0

Rhododendron carolinianum


Common Name: Carolina Rhododendron
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
0

Rhododendron catawbiense


Common Name: Catawba Rhododendron
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
0

Rhododendron chapmanii


Common Name: Chapman's azalea, Chapman's rhododendron
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
0

Rhododendron maximum


Common Name: Rosebay Rhododendron
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -30 to -40ºF ZONE 3
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
0

Rhododendron mucronulatum


Common Name: Korean Rhododendron
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
0

Rhododendron prunifolium


Common Name: pruneleaf azalea
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
0

Rhododendron schlippenbachii


Common Name: Royal Azalea
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
0

Rhododendron spp.


Common Name: azalea, rhododendron
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
0

Rhododendron x laetevirens


Common Name: Wilson Rhododendron
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
0

Rhodophiala advena


Common Name: Añañuca
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
0

Rhodophiala bifida


Common Name: Oxblood Lily, Schoolhouse Lily
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: None
0

Rhodophiala pratensis


Common Name: Rhodophiala
Plant Type:
  • bulb, tuber, corm
  • perennial

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
0

Rhodothamnus chamaecistus


Common Name: Dwarf Alpenrose
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 7-8
0

Rhodotypos kerrioides


Common Name: Jetbead, White Kerria, Black Jetbead, Jetberry Bush
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 5-8
0

Rhodotypos scandens


Common Name: Jetbead
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 4-8
0

Rhoicissus capensis


Common Name: Glossy Forest Grape
Plant Type:
  • trees, shrubs
  • vines and climbers

USDA Hardiness Zones:
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: none
0

Rhoicissus rhombifolia


Common Name: Grape Ivy
Plant Type:
  • trees, shrubs
  • vines and climbers

USDA Hardiness Zones:
  • 60 to 50ºF ZONE 12
  • 70 to 60ºF ZONE 13
  • 80 to 70ºF ZONE 14

Winter Sowing Zones: none
0

Rhombophyllum rhomboideum


Plant Type:
  • perennial
  • succulent and cactus

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11

Winter Sowing Zones: none
0

Rhus aromatica


Common Name: Fragrant Sumac
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -30 to -40ºF ZONE 3
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
0

Rhus chinensis


Common Name: Chinese Sumac
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
0

Rhus copallina


Common Name: Winged Sumac
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
0

Rhus copallinum


Common Name: Shining sumac, Winged sumac
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11
0

Rhus glabra


Common Name: Smooth Sumac
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -30 to -40ºF ZONE 3
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
0

Rhus ovata


Common Name: Sugar Bush, Sugarbush
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11
0

Rhus typhina


Common Name: staghorn summac, velvet sumac
Plant Type:
  • perennial
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
0

Rhynchostylis gigantea


Common Name: Foxtail Orchid
Plant Type:
  • epiphyte, terrestrial

USDA Hardiness Zones:
  • 70 to 60ºF ZONE 13
  • 80 to 70ºF ZONE 14

Winter Sowing Zones: none
0

Rhynchostylis retusa


Common Name: Foxtail Orchid
Plant Type:
  • epiphyte, terrestrial

USDA Hardiness Zones:
  • 80 to 70ºF ZONE 14

Winter Sowing Zones: none
0

Ribes alpinum


Common Name: Alpine Currant
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -50 to -40ºF ZONE 2
  • -30 to -40ºF ZONE 3
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
0

Ribes rubrum


Common Name: Cultivated Currant
Plant Type:
  • fruits, vegetables
  • trees, shrubs

USDA Hardiness Zones:
  • -30 to -40ºF ZONE 3
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
0

Richea dracophylla


Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: none
0

Ricinus communis


Common Name: castor bean, castor oil plant, palma Christi, wonder tree
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
  • 50 to 40ºF ZONE 11
0

Robinia ambigua 'Decaisneana'


Common Name: Decaisneana Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zones 4-8
0

Robinia fertilis


Common Name: Bristly Locust, Rose Acacia
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zones 6-8
0

Robinia hispida


Common Name: Bristly Locust, Rose Acacia
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zones 6-8
0

Robinia hispida 'Monument'


Common Name: Monument Bristly Locust, Rose Acacia
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zone 6-8
0

Robinia hispida var. fertilis


Common Name: Bristly Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zone 6-8
0

Robinia kelseyi


Common Name: Allegheny Moss Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zones 6-8
0

Robinia luxurians


Common Name: New Mexixo Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Robinia neomexicana


Common Name: New Mexico Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Robinia pseduoacacia 'Appalachia'


Common Name: Appalachia Black Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 4-8
0

Robinia pseudoacacia


Common Name: Black Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
0

Robinia pseudoacacia 'Aurea'


Common Name: Aurea Black Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 4-8
0

Robinia pseudoacacia 'Crispa'


Common Name: Crispa Black Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 4-8
0

Robinia pseudoacacia 'Fastigiata'


Common Name: Fastigiata Black Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Robinia pseudoacacia 'Frisia'


Common Name: Frisia Black Locust
Plant Type:
  • trees, shrubs

Winter Sowing Zones: zones 5-8
0

Robinia pseudoacacia 'Inermis'


Common Name: Inermis Black Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Robinia pseudoacacia 'Pyramidalis'


Common Name: Pyramidalis Black Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Robinia pseudoacacia 'Tortuosa'


Common Name: Tortuosa Black Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Robinia pseudoacacia 'Umbraculifera'


Common Name: Umbraculifera Black Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Robinia pseudoacaia 'Bessoniana'


Common Name: Bessoniana Black Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -20 to -30ºF ZONE 4
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 4-8
0

Robinia var. kelseyi


Common Name: Allegheny Moss Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Robinia x margaretta


Common Name: Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10

Winter Sowing Zones: zones 6-8
0

Robinia x margaretta 'Pink Cascade'


Common Name: Pink Cascade Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Robinia x slavinii


Common Name: Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zones 5-8
0

Robinia 'Casque Rouge'


Common Name: Casque Rouge Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9

Winter Sowing Zones: zone 5-8
0

Robinia 'Idaho'


Common Name: Idaho Locust
Plant Type:
  • trees, shrubs

USDA Hardiness Zones:
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
  • 30 to 20ºF ZONE 9
  • 40 to 30ºF ZONE 10
0

Rodgersia aesculifolia


Common Name: Fingerleaf Rodgersia
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8
0

Rodgersia japonica


Common Name: Rodgersia
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 5-8
0

Rodgersia pinnata


Common Name: Rodgersia
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 5-8
0

Rodgersia pinnata 'Superba'


Common Name: Rodgersia
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 5-8
0

Rodgersia podophylla


Common Name: Rodgersia
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 5-8
0

Rodgersia sambucifolia


Common Name: Rodgersia
Plant Type:
  • perennial

USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Winter Sowing Zones: zones 5-8
0
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