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The Plant Guide

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‘Summer Sundae’ Sweet William

Dianthus barbatus 'Summer Sundae'

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‘Summer Sundae’ Sweet William is a nice mix of red, pink, and white flowers held in rounded groups at the tops of stems. Plants bloom from late spring to early summer. The flowers are lightly fragrant. Use in a cottage garden or border, or in containers. It flowers the first year from seed.

Noteworthy CharacteristicsBiennial that flowers in the first year from seed. A mix of reds, pinks, and white. Lightly fragrant.

CareGrow in full sun and well-drained, neutral to slightly alkaline soil. Will not tolerate standing water in winter. Organic mulches may encourage fungal diseases. Deadhead regularly. Provide a break from afternoon sun in hot climates.

PropagationSow seed in a cold frame from autumn to early spring, or sow in situ in summer to flower the following year.

ProblemsSlugs, sow bugs, grasshoppers, chipmunks, squirrels, and deer commonly cause problems. Blister beetles are problematic in the West, while fungal diseases are prevalent in humid regions and poorly drained soils.

  • Genus : Dianthus
  • Plant Height : 1 to 3 feet
  • Zones : 3, 4, 5, 6, 7, 8, 9
  • Plant Width : 6 to 12 inches
  • Moisture : Adaptable
  • Plant Type : Annuals
  • Uses : Containers
  • Bloom Time : Early Summer, Late Spring, Spring, Summer
  • Characteristics : Fragrant Flowers
  • Light : Full Sun
  • Growth Rate : Moderate
  • Maintenance : Moderate
  • Flower Color : Pink, Red, White
  • Plant Seasonal Interest : Spring Interest
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