Plant Spinach in Zone 12a
Seed-starting, transplant & harvest dates for USDA Zone 12a
Zone 12a is effectively frost-free, so the Zone 12a calendar for spinach 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 spinach will finish but whether it will sit through the hottest stretch of the year. Spinach is a hardy crop needing about 45 days from sowing to harvest.
Planting spinach for a fall harvest in Zone 12a
Zone 12a has no meaningful frost, so the fall and winter months are the easiest time of year to grow spinach here. Sow from about October 1 onward.
Spinach sown 4 to 6 weeks before the first frost sizes up, stalls through winter under a row cover, and restarts weeks before anything can be sown in spring.
Fall dates are counted backward from the Zone 12a average first frost, not forward from a sowing date. See the fall planting calendar by zone for the full method.
Spring vs fall spinach in Zone 12a
| Planting | Sow or start | In the ground | Harvest |
|---|---|---|---|
| Spring | Feb 1 | Feb 1 | Mar 18 |
| Fall | Oct onward | Oct onward | Next spring |
Spinach in nearby zones
Further reading on spinach
- Cold frame gardening by zone
How a cold frame keeps spinach producing into winter, and when to sow it.
- Winter sowing guide
Sowing spinach outdoors in jugs in late winter, with no lights.
- Last frost date and what to plant before it
Why spinach can go out before your last frost, and how far before.
Other crops in Zone 12a
Frequently asked questions
When should I start spinach in Zone 12a?
Direct sow outdoors around Feb 1.
Can I direct sow spinach in Zone 12a?
Yes, direct sow around Feb 1.
Can I plant spinach in the fall in Zone 12a?
Zone 12a has no meaningful frost, so the fall and winter months are the easiest time of year to grow spinach here. Sow from about October 1 onward.
Will spinach survive frost in Zone 12a?
Spinach is a hardy crop and keeps going roughly 28 days past the first light frost in Zone 12a. A row cover or a straw mulch buys more.