Cucumber in Zone 11a & 11b
Cucumis sativus
When to plant cucumber 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. Cucumber tolerates either.
| Start indoors | Dec 11–Dec 18 |
|---|---|
| Direct sow / transplant outside | Jan 8–Jan 15 |
| Estimated harvest | Mar 4–Mar 11 (~55 days after planting) |
Spacing: 2 per square foot (square-foot-gardening spacing). Mature height: 5-6 ft.
Cucumbers are vigorous vines, and the single best decision you can make for them is giving them something to climb. A trellised cucumber uses a fraction of the ground space of one left to sprawl, gets better airflow (which means fewer fungal problems), and tends to grow straighter fruit since it isn't resting on the ground.
How cucumber 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
- Bush Beans: Beans fix nitrogen that heavy-feeding cucumbers use.
- Radish: Reputed as a trap crop for cucumber beetles, but the documented trap-crop research for cucumber beetles points to Blue Hubbard squash specifically, not radish. Radish IS a real, documented trap crop, but for flea beetles on brassica crops — a different pest and crop pairing than this one. Treat this specific pairing as garden tradition, not measured evidence. (usually zones 2-10, so not a pairing for zone 11b)
Where to buy cucumber seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing cucumber" 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 Cucumber in USDA zone 11b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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