Sweet William (Dianthus barbatus) is a biennial or short-lived perennial with dense clusters of clove-scented flowers, grown widely in borders and cottage gardens. It needs sun or partial shade and well-drained, slightly alkaline soil.
Family
Caryophyllaceae (Pink & carnation family)
Grows as
Perennial
Light
Part shade
Water
Water regularly during dry spells and keep the soil from drying out completely, but avoid waterlogging.
Soil
Loamy, well-drained, slightly alkaline soil.
Temperature
10–24 °C; hardy to about -20 °C, protect from prolonged waterlogged cold.
How easy
Easy
Safety
Not known to be toxic. Toxic to cats and dogs (ASPCA).
Edible
Yes, some parts
Native range
European Mts., S. Russian Far East to N. Korea
Climate
temperate
About
Dianthus barbatus, the sweet William, is a species of flowering plant in the family Caryophyllaceae, native to southern Europe and parts of Asia. It has become a popular ornamental garden plant. It is a herbaceous biennial or short-lived perennial plant growing to 13–92 cm tall, with flowers in a dense cluster of up to 30 at the top of the stems. Each flower is 2–3 cm diameter with five petals displaying serrated edges. Wild plants produce red flowers with a white base, but colours in cultivars range from white, pink, red, and purple to variegated patterns. The exact origin of its English common name is unknown but first appears in 1596 in botanist John Gerard's garden catalogue. The flowers are edible and may have medicinal properties. Sweet William attracts bees, birds, and butterflies.
How to grow it
Sweet William is a popular ornamental plant in gardens, with numerous cultivars and hybrids selected for differing flower colour, ranging from white, pink, red, and purple to variegated patterns.
The plant was introduced to northern Europe in the 16th century, and later to North America and elsewhere, and has become locally to widely naturalised in these areas.
Text excerpted from the Wikipedia article Dianthus barbatus by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.