Serena™white summer snapdragon (Angelonia angustifolia 'PAS394032') is the first of the summer snapdragons that comes true from seed; all others are propagated by tissue culture or cuttings. From June through September, white blooms cover this nonhardy perennial from Central America. Grow it in full sun when temperatures are warm, and use only moderate irrigation and fertilization. This cultivar is insect and disease resistant.