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Sweet William
Scientific Name: Dianthus barbatus L.
Synonym:
Family: Caryophyllaceae
Sweet William (Dianthus  barbatus) Recommended Temperature Zone:
sunset: All zones
USDA: 7-10

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)

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.

Fruiting Habits:

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.


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Desert-Tropicals is dedicated to provide gardening advice, gardening ideas, and information about flower of all kind for landscape and collections. We try to check carefully the identification of the plants on the illustrations as well as the other information from the page, but occasionally errors do occur. if you notice anything that needs to be changed please contact us. Thanks.

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