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Sweet William (Dianthus barbatus) Summertime Mix

Price range: £1.39 through £10.29

Sweet William ‘Summertime Mix’ is a tall, vibrant variety producing large flower heads in shades of white, pink, and deep red. With its long stems and strong fragrance, it is ideal for cutting and adding colour to borders.

SKU: Rng_374358131667 Categories: , ,
  1. Surface sow onto moist, well-drained seed compost from February-April.
  2. Alternatively, sow directly outdoors after the last frost onto prepared soil.
  3. Keep at 12-15c, germination occurs in 14-21 days.
  4. When seedlings are large enough, transplant into 8cm pots.
  5. Grow on in a cool greenhouse or bright windowsill, keeping the soil moist but not waterlogged.
  6. Gradually acclimatise plants before moving them outdoors.
  7. Plant out in full sun, in moist, well-drained soil, spacing 60cm apart, once all risk of frost has passed.
  8. If sown directly outside, thin to 25cm apart, replanting usable thinnings.
  9. Sow under glass between May-July for flowering the following year.
  10. Deadhead regularly to extend the flowering period.

Genus: Dianthus
Species: Barbatus
English Name: Sweet William
Hardiness: Half-Hardy
Lifecycle: Biennial
Sowing Months: May-Jul
Flowering: Jun-Aug

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2026 Premier Seeds Direct

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