How to grow sweet william

When to plant sweet william

Sweet William is a biennial or short-lived perennial usually grown from seed; it forms a leafy clump the first year and flowers in spring of the second. NCSU notes it thrives in sun or partial shade and tolerates heat and humidity, making it a dependable cottage-border and cutting-garden plant in cooler regions.

Sweet William is timed by season rather than your frost dates, so the planting calendar does not generate ZIP-specific dates for it. Check the cited sources below to fine-tune for your area.