Tomato in Zone 11a & 11b
Solanum lycopersicum
When to plant tomato in zone 11b
Zones 11a and 11b share the same average frost dates in our data, so this page covers both.
Method: Start indoors: Start indoors from seed, then transplant outside. Tomato needs a head start most zones can't give it by direct-sowing alone.
| Start indoors | Nov 20–Nov 27 |
|---|---|
| Direct sow / transplant outside | Jan 15–Jan 22 |
| Estimated harvest | Mar 26–Apr 2 (~70 days after transplanting) |
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 3-6 ft.
Tomatoes are the crop most people plant first, and for good reason: a single well-tended plant can produce for months, and the taste difference between a homegrown and store-bought tomato is the single biggest "why do I garden" argument there is.
How tomato 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.
Heat warning for zone 11b: Zone 11b summer nights commonly exceed 75°F, which stalls pollination and causes blossom drop in Tomato at the height of summer (University of Maryland Extension, via UDel Cooperative Extension). Expect a slow patch for fruit set during the hottest stretch even though the plant keeps growing. It typically resumes once nights cool.
Good companions
- Basil: Widely reputed to improve tomato flavor and repel pests, but a multi-year, garden-scale controlled trial found no consistent taste preference in blind tests, and no evidence basil reduced pest pressure — treat this as one of companion planting's least-supported popular claims.
- Marigold: UF/IFAS Extension confirms French marigold is effective against a wide range of root-knot nematode species — a real, documented effect, not folklore. The insect-pest-deterrent half of this claim is less well documented.
- Carrot: Loosens soil for tomato roots without competing for space above ground. (usually zones 2-10, so not a pairing for zone 11b)
Where to buy tomato seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing tomato" 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 Tomato in USDA zone 11b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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