Sweet William

Frost Tolerance: Cool season annuals in Phoenix

Heat Tolerance: Afternoon shade in hot areas

Sun Exposure: Full sun

Origin: Europe

Growth Habits: Biennial , often grown as annual, up to 18 inches tall (45 cm), 12 inches spread (30 cm)

Flowers: White, pink or red flowers

Watering Needs: Regular water, well drained soil.

Propagation: Seeds

Dianthus barbatus, Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 2: 75.

Dianthus barbatus in Curtis Botanical Magazine

Blooming Habits:
The flowers are white to pink to red, and are not very fragrant.

Propagation:
They can be started outside or inside. In mild winter areas, plant them or start them in late fall. In cold winter areas, start them inside 6 weeks before the last frost date, or sow them in place 2 weeks before the last frost date. Germination takes a week to a week and a half. Cover the seeds with a thin layer of mulch. Transplant or thin out 8 inches apart (20 cm). Deadhead regularly, and trim severely when the blossom slows down to get a second flush.