About
A series of Sweet Williams usually grown as biennials. All cultivars in the series are compact plants with uniform flowering. Cultivars within the series are available in a range of colours, including lilac, purple, pink, red, salmon and white.
About the genus
Dianthus can be annuals, evergreen perennials or subshrubs with narrow, often greyish leaves and showy flowers that are frequently fragrant
Growing conditions
SunlightFull sun
Soil typeLoam, Sand, Chalk, Clay
Soil pHNeutral, Alkaline, Acid
Soil moistureWell-drained
AspectSouth-facing, West-facing, East-facing
ExposureExposed, Sheltered
UK hardinessH6
Plant details
Plant typeAnnual Biennial, Bedding
HabitBushy
FoliageEvergreen
Height0.1-0.5 metres
Spread0.1-0.5 metres
Time to full height1-2 years
Suggested usesCity and courtyard gardens, Cottage and informal garden, Patio and container plants, Wildlife gardens
ToxicityHumans/Pets: Skin allergen, wear gloves and other protective equipment when handling. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Care notes
CultivationGrow in a well-drained soil in full sun
PruningDeadhead regularly to prolong flowering
PropagationPropagate by softwood cuttings of non-flowering shoots. Dianthus barbatus can be grown from seed, but seed collected from cultivars may result in plants with different characteristics
Pest resistanceMay be susceptible to slugs and aphids
Disease resistanceMay be susceptible to powdery mildews, a rust, a virus and fusarium wilt