Snowgoose Mock Orange (Philadelphus) is a free dlowering, deciduous shrub with upright, arching shoots and ovate, entire, dark green leaves, 1 1/2-2 1/2" long.
Flowers on previous years growth
Prune: Annually after flowering, cut back flowered shoots to strong buds or young lower or basal growth. On established plants, cut back about 1/3 to 1/5 of old shoots to the base, to promote replacement growth.
Uses: Grow in a shrub border, or as specimen plants in a woodland garden; larger cultivars can be used for screening.
Cultivation: During growing season, water freely and apply a balanced liquid fertilizer monthly. Keep just moist in winter.
Source: The American Horticultural Society A to Z Encyclopedia of Garden Plants