Dianthus barbatus Seeds (Sweet William)
Dianthus barbatus, commonly known as Red-White Sweet William, is a biennial or short-lived perennial. It displays dense clusters of fragrant, colorful flowers, often bicolor, in shades of red and white. Sweet William reaches heights of 6-24 inches, with a bushy habit. This charming garden favorite thrives in USDA hardiness zones 3-9. Easy to cultivate from Dianthus barbatus seeds, it’s well-suited for borders, cottage gardens, and containers, adding vibrant, old-fashioned charm to any landscape with its delightful and long-lasting blooms.
Growing Dianthus barbatus from Seed
- Growth cycle: Perennial
- Watering: Medium
- Sunlight: Full Sun
- Suitable climates: Marine West Coast, Mediterranean, Humid Subtropical, Tropical Wet, Tropical Wet & Dry
- Where to grow: Outdoors
- Flower color: Red
Germinating Sweet William Flower Seeds
To germinate Dianthus barbatus seeds, sow them indoors in early spring or outdoors after the last frost. Plant seeds in well-drained soil, cover lightly, and keep them consistently moist. Place in a sunny location or provide bright light. Germination typically occurs in 10-21 days.
We source all of our Dianthus barbatus seeds from a small greenhouse facility based in southeastern Maine and store them in a dark, temperature-controlled environment before shipment. You’ll find that our fresh Sweet William seeds are much easier to germinate than the mass-produced packets of flower seeds found in stores! If you have any trouble growing Sweet William seeds, we’re happy to send you additional gardening tips. In the (unlikely) event that your Dianthus barbatus seeds do not germinate at all, we’ll give you a full refund, no questions asked.
We offer this variety on Etsy, eBay, and Amazon, as well!
Shipping & returns
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