When to Plant in Spring:
- Earliest Planting Date: 2 weeks after Average Last Frost
- Latest Planting Date: 5 weeks after Average Last Frost
- Length of Planting Window: 3 weeks
- To find your Average First or Last Frost, click here and type in your zip code.
Planting: Direct sow when soil is warm, after last frost. Sow in groups of 2-3 seeds, ½ inch deep. Thin to one plant when true leaves appear. Space plants about 18-24 inches apart.
Care: You may need to provide support stakes for taller plants to avoid drooping. Petals can be fragile so take care when cutting.
Harvesting: Cut flowers as needed after they bloom and remember that petals are fragile.
Germination: 7-14 days
Preferences: plenty of water, full/partial sun, well-draining soil
Special Instructions/Tips: Sunflowers are sensitive to root disturbance and do not transplant well, so direct sowing is recommended.