When to plant kale in Zone 3b
In Zone 3b, start indoors around March 11 – March 25 and transplant around April 15 – April 29. For a fall crop, sow around June 20 – July 4.
Your kale timeline — Zone 3b
| Start indoors | March 11 – March 25 |
|---|---|
| Transplant | April 15 – April 29 |
| Sow for fall | June 20 – July 4 |
| Zone 3b last frost | ~05/20 |
| Zone 3b first frost | ~09/19 |
Start indoors; set out 4 weeks before the last frost. [src]Cited: University of New Hampshire Cooperative Extension — “Growing Vegetables: When to Plant Your Vegetable Garden”
Dates computed from Zone 3b's median NOAA frost normals and the cited rule. Your town may differ by a week or two — check your exact ZIP.
What you'll need
Affiliate links — as an Amazon Associate we may earn from qualifying purchases, at no extra cost to you.
Last verified 2026-07-16. Frost: NOAA NCEI 1991–2020. Zone: USDA 2023. Rule: University of New Hampshire Cooperative Extension — “Growing Vegetables: When to Plant Your Vegetable Garden”; UGA Extension (days to maturity).