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When to plant kohlrabi in Zone 5b
In Zone 5b, start indoors around February 23 – March 9 and transplant around March 30 – April 13.
Your kohlrabi timeline — Zone 5b
| Start indoors | February 23 – March 9 |
|---|---|
| Transplant | March 30 – April 13 |
| Zone 5b last frost | ~05/04 |
| Zone 5b first frost | ~10/08 |
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 5b'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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Last verified 2026-07-17. Frost: NOAA NCEI 1991–2020. Zone: USDA 2023. Rule: University of New Hampshire Cooperative Extension — “Growing Vegetables: When to Plant Your Vegetable Garden”.