Kohlrabi
Vegetables · Sow outdoors or set out
Kohlrabi planting dates
At usual odds in 2026: spring Mar 23 – May 11; fall around Aug 21.
The guide's rule Spring: 5 weeks before last frost to 2 weeks after last frost. Fall: 10 weeks before first frost.
Frost odds · chance of a freezing night after your spring date
The 2026 season
Start indoors Plant out / sow Frost risk
At all three odds
| Frost odds | Start indoors | Plant / sow |
|---|---|---|
| Bold (1 in 2) | spring: Jan 19 – Mar 23; fall: Jun 30 – Jul 14 | spring: Mar 16 – May 4; fall: around Aug 25 |
| Usual (3 in 10) | spring: Jan 26 – Mar 30; fall: Jun 26 – Jul 10 | spring: Mar 23 – May 11; fall: around Aug 21 |
| Careful (1 in 10) | spring: Feb 3 – Apr 7; fall: Jun 17 – Jul 1 | spring: Mar 31 – May 19; fall: around Aug 12 |
- Days to first harvest
- 25-60 from seed 45-60, after transplanting 25-35
- How it goes in
- Sow outdoors or set out 6-8 weeks indoors to transplant size
- Frost
- Frost-hardy Takes light frost.
- Soil to germinate
- 50-75°F
Plan it in your Garden Book
The book checks your date against the window and tells you when the first harvest could come.
Plus Free Garden Books hold 8 plantings a season; Seed Clock Plus holds 120: $1.95/month or $19.50/year. Free during preview What Plus adds
Source: Montana State University Extension, MontGuide MT199308AG, "Can I Grow That Here? Vegetable Seed and Transplant Schedules for Garden or Container" (reviewed August 2013), read with NOAA 1991-2020 freeze odds for Cleveland Hopkins. Wording ours; how we read the guide.