Plant Tomatoes in Zone 12b
Seed-starting, transplant & harvest dates for USDA Zone 12b
Zone 12b is effectively frost-free, so the Zone 12b calendar for tomatoes is set by heat, not cold. There is no last frost to count backward from and no first frost to beat, which means the question is not whether tomatoes will finish but whether it will sit through the hottest stretch of the year. Tomatoes is a tender crop needing about 75 days from sowing to harvest.
Planting tomatoes for a fall harvest in Zone 12b
Zone 12b has no meaningful frost, so the fall and winter months are the easiest time of year to grow tomatoes here. Sow from about October 1 onward.
A second tomato crop only works where the first fall frost is late enough to finish it, which in practice means zone 9 and warmer.
Fall dates are counted backward from the Zone 12b average first frost, not forward from a sowing date. See the fall planting calendar by zone for the full method.
Spring vs fall tomatoes in Zone 12b
| Planting | Sow or start | In the ground | Harvest |
|---|---|---|---|
| Spring | Feb 1 | Feb 1 | Apr 17 |
| Fall | Oct onward | Oct onward | Winter |
Tomatoes in nearby zones
Further reading on tomatoes
- When to start seeds indoors by zone
Indoor start dates for tomatoes, counted back from your last frost.
- Hardening off seedlings: a schedule
A day by day plan for moving tomatoes seedlings outdoors.
- Best grow lights for seed starting
What light seedlings actually need, and which fixtures deliver it.
Other crops in Zone 12b
Frequently asked questions
When should I start tomatoes in Zone 12b?
Direct sow outdoors around Feb 1.
Can I direct sow tomatoes in Zone 12b?
Yes, direct sow around Feb 1.
Can I plant tomatoes in the fall in Zone 12b?
Zone 12b has no meaningful frost, so the fall and winter months are the easiest time of year to grow tomatoes here. Sow from about October 1 onward.
Will tomatoes survive frost in Zone 12b?
No. Tomatoes is a tender crop and a single light frost ends it, so every Zone 12b planting has to finish before the average first frost (Zone 12b rarely sees one).