When to Plant in Spring:
- Earliest Planting Date: Average Last Frost
- Latest Planting Date: 4 weeks after Average Last Frost
- Length of Planting Window: 4 weeks
- To find your Average First or Last Frost, click here and type in your zip code.
Planting: Plant seeds 1/8 inch deep. Thin plants to stand 12 to 24 inches apart. Plants will bloom in the second year.