Mustard Greens in Zone 11a & 11b
Brassica juncea
When to plant mustard greens in zone 11b
Zones 11a and 11b share the same average frost dates in our data, so this page covers both.
Method: Direct sow: Direct-sow outside. Mustard Greens doesn't transplant well, or doesn't need the extra time indoors.
| Start indoors | Not typically started indoors |
|---|---|
| Direct sow / transplant outside | Dec 11–Dec 18 |
| Estimated harvest | Jan 20 '27–Jan 27 '27 (~40 days after direct-sowing) |
Spacing: 4 per square foot (square-foot-gardening spacing). Mature height: 1-2 ft.
Mustard greens are one of the fastest crops you can grow for a full harvest, direct-sown and ready to cut in under six weeks, with a peppery bite that gets sharper the longer a leaf sits on the plant. They're also one of the most cold-tolerant greens, holding up to frost that would finish off lettuce.
How mustard greens 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
- Lettuce: Similar light/water needs for a shared salad bed. (usually zones 2-10, so not a pairing for zone 11b)
- Carrot: Non-competing pairing with mutual pest benefit. (usually zones 2-10, so not a pairing for zone 11b)
Where to buy mustard greens seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing mustard greens" 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 Mustard Greens in USDA zone 11b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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