Kohlrabi in Zone 11a & 11b
Brassica oleracea (Gongylodes group)
When to plant kohlrabi in zone 11b
Zones 11a and 11b share the same average frost dates in our data, so this page covers both.
Method: Either: Start indoors for an earlier harvest, or direct-sow outside for less fuss. Kohlrabi tolerates either.
| Start indoors | Nov 27–Dec 4 |
|---|---|
| Direct sow / transplant outside | Dec 18–Dec 25 |
| Estimated harvest | Feb 11 '27–Feb 18 '27 (~55 days after planting) |
Spacing: 4 per square foot (square-foot-gardening spacing). Mature height: 1-1.5 ft.
Kohlrabi looks like nothing else in the garden: a pale green or purple bulb that swells right at the soil line, with leaves shooting out of it like a small alien plant. It's mild, crisp, and closer to a cross between broccoli stem and jicama than anything most people expect from a brassica.
How kohlrabi fits zone 11's season
Zone 11b is frost-free in this dataset, so frost is not what limits the calendar here. What you can plant, and when, comes down to summer heat and daylength instead.
Good companions
- Beet: Compatible nutrient needs; common bed-sharing pair. (usually zones 2-10, so not a pairing for zone 11b)
Where to buy kohlrabi seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing kohlrabi" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 11b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Kohlrabi in USDA zone 11b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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