Sweet William (Dianthus) Seeds – 250 Count

Southern Seeds was founded in 2019 by Ryan and Kim Dorn and became Seed Therapy in 2025. The family business moved its operations to the Dallas, Texas, area in 2023. Drawing on generations of growing experience, the team focuses on dependable seeds, personal customer service, and helping gardeners succeed. Its work includes relationships with American farms and seed donations to schools and community gardens.

Fill your garden with old-fashioned charm and a delightful, spicy fragrance with Sweet William seeds. This beloved heirloom is a cottage garden classic, celebrated for its dense, rounded clusters of beautiful, fringed flowers. This mix produces a stunning array of colors, from rich reds and pinks to crisp whites, often in beautiful bi-color patterns. A favorite of bees and butterflies, Sweet William is an exceptional, long-lasting cut flower and a wonderfully easy-to-grow addition to any garden border.

Explore more flower seeds and garden seeds and growing essentials at BuyAmerican.

• Dense clusters of beautiful, fringed flowers in a mix of vibrant colors.
• A wonderful, spicy, clove-like fragrance that perfumes the garden air.
• An excellent and long-lasting cut flower for beautiful bouquets.
• An easy-to-grow, self-sowing biennial that acts like a short-lived perennial.

• Plant Name: Sweet William (Dianthus barbatus)
• Seed Quantity: Approx. 250 seeds
• Type: Heirloom, Open Pollinated, Non-GMO
• Lifecycle: Biennial (often grown as an annual)
• Height: 12-24 inches
• Days to Maturity: Blooms in the second year, or first if started very early.
• USDA Zone: 3-11
• Origin: American Grown

Sold as seeds for planting. Select this packet by its variety, quantity, and growing requirements; it is not a live plant.

Country of origin: United States. The supplier identifies this product as American-grown.

• Sowing: Direct sow seeds outdoors in late spring or summer for blooms the following year. Can also be started indoors 6-8 weeks before the last frost.
• Depth: Plant seeds just below the surface of the soil.
• Spacing: Space or thin plants to 12-18 inches apart.
• Light Requirement: Full Sun to Partial Shade.
• Soil: Prefers rich, well-draining, slightly alkaline soil.
• Care: Deadheading spent flowers will encourage a longer bloom period.

Keep unused seeds dry and cool in a clearly labeled, closed container. Protect the packet from humidity and temperature swings, and retain the variety name and sowing notes for your next planting. Use the species-specific directions below when deciding whether to start indoors, sow directly, soak seeds, or provide a cold period. Germination and growth vary with seed handling and local growing conditions.

For general seed-starting and storage guidance, see University of Minnesota Extension’s seed-starting guide. Use the variety-specific packet directions for this product.

Shipping for this product

This product ships directly from Southern Seeds, now Seed Therapy. The supplier currently lists standard processing of 1–3 business days, increasing to approximately 3–5 business days during the busy late-December-through-April-or-May seed season. Processing is separate from carrier transit time. Its published standard shipping rate is $4.99 per order, with free standard shipping at a merchandise subtotal of $35 or more after discounts and before taxes. The options, offers, and final charges displayed at BuyAmerican checkout govern this order; purchases from other makers may ship separately. Carrier delivery dates are estimates. The supplier ships within the United States and may restrict certain seeds by destination.

Returns and seed guarantee

For this product, Southern Seeds/Seed Therapy publishes a 60-day satisfaction guarantee, offering an eligible replacement or product-price refund for concerns reported within 60 days of delivery. Original shipping is generally excluded. Preference-based physical returns generally require customer-paid return shipping; supplier errors or damaged or defective items receive an appropriate resolution without an additional return-shipping charge. Contact BuyAmerican at hello@buyamerican.com with your order number, product name, and concern before mailing anything back. BuyAmerican’s standard return policy provides a 30-day request period for eligible unused items in original packaging. Ask BuyAmerican to coordinate any supplier guarantee request for your marketplace order.

Read the BuyAmerican return policy or contact BuyAmerican order support before a return.