When to plant kale in Zone 3b
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 |
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
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Seed-starting traysBurpee SuperSeed 36-cell trayReusable cells that pop seedlings out with the roots intact at transplant time.See it on Amazon- Seed-starting mixEspoma Organic Seed StarterA fine, sterile mix so small seeds can push through and seedlings don't rot.See it on Amazon
- Grow lightBarrina T5 LED grow lights, 4-packA windowsill is too dim in late winter; a light 2–3 in. above keeps seedlings short and sturdy.See it on Amazon
- Floating row coverAgribon AG-30 row coverAdds a few degrees of frost protection on cold nights and keeps insects off young plants.See it on Amazon
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Calendar computed 2026-09-28. Frost: NOAA NCEI 1991–2020. Zone: USDA 2023. Rule: University of New Hampshire Cooperative Extension — “Growing Vegetables: When to Plant Your Vegetable Garden”; University of Georgia Extension — Vegetable Planting Chart (Circular C963) (days to maturity).