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Geek Guides Plant Guide Plants Perennials Delphinium grandiflorum
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Delphinium grandiflorum
Pronunciation: del-FIN-ee-um grand-ih-FLO-rum
Family: Ranunculaceae, Buttercup
Common Name: Delphinium
Plant Type:
- perennial
Height to: 2'
Width to: 2'
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
Bloom Description: violet to blue or white flowers, loose inflorescence, more rounded shape
Bloom Season:
- early summer
- mid summer
- late summer
Sun Exposure:
- full sun
- part sun
Soil Type: well-drained, organic
Pests and Diseases:
bacterial leaf spot, crown rot and black leg; fungal crown and stem rots, damping-off, powdery mildew, leaf spots; viruses; aphids, cutworms, borers, leaf miners, beetles, sowbugs, root mealybug, mites, nematodes, slugs
Propagation: fresh seed or stratify, solid spring basal cuttings
Notes:
Growth rate: moderate to fast
Foliage: palmately lobed or divided
Light: sun
Pests and problems: bacterial leaf spot, crown rot and black leg; fungal crown and stem rots, damping-off, powdery mildew, leaf spots; viruses; aphids, cutworms, borers, leaf miners, beetles, sowbugs, root mealybug, mites, nematodes, slugs
Landscape habit, uses: front to back of borders
Other interest: hollow and brittle stems, short-lived in the South
Other culture: require heavy fertility, staking of tall cultivars Source: Perry's Perennial Pages, University of Vermont
Submitted by: Pectiwiccan
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