Plant Broccoli in Zone 12a
Seed-starting, transplant & harvest dates for USDA Zone 12a
Zone 12a is effectively frost-free, so the Zone 12a calendar for broccoli 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 broccoli will finish but whether it will sit through the hottest stretch of the year. Broccoli is a half-hardy crop needing about 65 days from sowing to harvest.
Planting broccoli 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 broccoli here. Sow from about October 1 onward.
Fall broccoli avoids the spring problem of heads buttoning up when temperatures spike. Start transplants indoors in midsummer rather than direct sowing into hot soil.
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 broccoli in Zone 12a
| Planting | Sow or start | In the ground | Harvest |
|---|---|---|---|
| Spring | Feb 1 | Feb 1 | Apr 7 |
| Fall | Oct onward | Oct onward | Winter |
Broccoli in nearby zones
Further reading on broccoli
- When to start seeds indoors by zone
Indoor start dates for broccoli, counted back from your last frost.
- Hardening off seedlings: a schedule
A day by day plan for moving broccoli seedlings outdoors.
- Best grow lights for seed starting
What light seedlings actually need, and which fixtures deliver it.
Other crops in Zone 12a
Frequently asked questions
When should I start broccoli in Zone 12a?
Direct sow outdoors around Feb 1.
Can I direct sow broccoli in Zone 12a?
Yes, direct sow around Feb 1.
Can I plant broccoli 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 broccoli here. Sow from about October 1 onward.
Will broccoli survive frost in Zone 12a?
Broccoli is a half-hardy crop and keeps going roughly 21 days past the first light frost in Zone 12a. A row cover or a straw mulch buys more.