Sweet William Dianthus
This familiar biennial features large 4" clusters of 1/2" flowers on 18-24"stems. Blooms in June and thereafter, in lots of different colors from white through deep red. Reseeds itself vigorously. The 1936 Vicks Seed catalog describes Sweet William as a favorite of old-time gardens, so it has been around a century or more and remains a personal favorite.
Biennial, Zones 3-9
Germination: 7-10 days
Germination Temperature: Optimum soil temperatures 65-75ºF
Seed Planting Depth: Sow on surface and lightly cover seeds
Starting Indoors: Start indoors 8-10 weeks before the last frost. Provide 65-75ºF soil temperature. Transplant after the last frost, 10-12" apart.
Sowing Outdoors: Direct sow mid to late spring or fall. Sow 3-5 seeds 10-12" apart
Growth Habit: Upright
Height and Width: 18-24" x 12-18"
Spacing: 10-12" apart
Light Needs: Full sun
Soil Needs: Loose, rich, well-drained
Approximate days to flower from seed: Blooms the second season
Uses: Flower beds, containers, cut flowers, attracts pollinators
Care: Water seedlings regularly until established. Amend soil with compost before transplanting. Harvest flowers often for bouquets or deadhead for continuous blooms.