Shallot in Zone 10a & 10b
Allium cepa var. aggregatum
Yes, shallot grows in zones 10a and 10b. Plant it outside Jan 9–Jan 16.
When to plant shallot in zone 10b
Zones 10a and 10b share the same average frost dates, so this page covers both.
Method: Direct sow: Direct-sow outside. It doesn't transplant well, or doesn't need the extra time indoors.
| Start indoors | Not typically started indoors |
|---|---|
| Direct sow / transplant outside | Jan 9–Jan 16 |
| Estimated harvest | Apr 27–May 4 (~108 days after direct-sowing) |
Spacing: 9 per square foot (square-foot-gardening spacing). Mature height: 1-1.5 ft.
Plant alongside it in zone 10b
These go outside within two weeks of shallot in zone 10b, so one planting day can cover them.
- Broccoli Rabe (Raab)Jan 9–Jan 16
- MizunaJan 9–Jan 16
- TatsoiJan 9–Jan 16
- Flower SproutsJan 16–Jan 23
- Gai Lan (Chinese Broccoli)Jan 16–Jan 23
- KalettesJan 16–Jan 23
A shallot is an onion that decided to be several onions. Instead of swelling into one bulb it splits into a cluster of small ones, each with a milder, sweeter, more refined flavour than a cooking onion. It's the allium you want raw in a vinaigrette, where a raw onion would take over.
How shallot fits zone 10's season
Zone 10b's frost-free window runs about 324 days, from January 30 to December 20. Shallot needs about 108 days from sowing to first harvest.
Shallot planting windows in every zone
Zone 10b is highlighted. Useful for comparing against a neighbouring zone, or for a garden somewhere else.
| Zone | Start indoors | Sow or plant out | Harvest |
|---|---|---|---|
| 3a & 3b | Not usually | May 9–May 16 | Aug 25–Sep 1 |
| 4a & 4b | Not usually | Apr 24–May 1 | Aug 10–Aug 17 |
| 5a & 5b | Not usually | Apr 19–Apr 26 | Aug 5–Aug 12 |
| 6a & 6b | Not usually | Apr 4–Apr 11 | Jul 21–Jul 28 |
| 7a & 7b | Not usually | Mar 20–Mar 27 | Jul 6–Jul 13 |
| 8a & 8b | Not usually | Mar 4–Mar 11 | Jun 20–Jun 27 |
| 9a & 9b | Not usually | Jan 25–Feb 1 | May 13–May 20 |
| 10a & 10b (your zone) | Not usually | Jan 9–Jan 16 | Apr 27–May 4 |
Harvest dates are about 108 days after the sow or plant-out date.
Good companions
- Carrot: A peer-reviewed field study (Uvah & Coaker 1984) found intercropping onion with carrot reduced carrot rust fly damage via scent-masking. Shallot is the same species as onion (Allium cepa, just a different cultivar group), so the result should carry over more reliably than most, but shallot itself wasn't the variety tested, so treat the specific magnitude as unconfirmed even though the mechanism should carry over.
Where to buy shallot seeds
Burpee (each supplier's shallot seeds)
See why we recommend these suppliers →
As an Amazon Associate we earn from qualifying purchases. Some links on this page also go to other retailers we may earn a commission from as an affiliate, at no extra cost to you. We only recommend products with a clear consensus of positive, independent reviews, or ones we bought and use ourselves. Each item on our gear page says which.
See it growing
Search YouTube for "growing shallot" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 10b calendar · Plan your beds in the Garden Designer →
Pin this for later
Growing Shallot in USDA zone 10b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
Save to Pinterest