Celosia in Zone 10a & 10b
Celosia argentea
Yes, celosia grows in zones 10a and 10b. Start seeds indoors in Feb–Apr and plant out in Apr–Jun.
When to plant celosia in zone 10b
Zones 10a and 10b share the same average frost dates, so this page covers both.
Method: Start indoors: Start indoors from seed, then transplant outside. In your zone it needs a head start on the heat that direct-sowing elsewhere doesn't require.
| Window | Spring window |
|---|---|
| Start indoors | Feb–Apr |
| Direct sow / transplant outside | Apr–Jun |
| Estimated bloom | ~80 days after transplanting |
Spacing: 2 per square foot (square-foot-gardening spacing). Mature height: 1-2.5 ft.
Zone 10b dates sourced from growinginthegarden.com.
Celosia is a dense, upright bloomer (either the crested "brain" type or the feathery plume type) that handles heat and drought well once it's up and growing, making it one of the more forgiving flowers on this list.
How celosia fits zone 10's season
Zone 10b's frost-free window runs about 324 days, from January 30 to December 20. Celosia needs about 80 days from sowing to first bloom.
Celosia 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 | Bloom |
|---|---|---|---|
| 2a & 2b | Apr 1–Apr 8 | May 27–Jun 3 | Aug 15–Aug 22 |
| 3a & 3b | Apr 11–Apr 18 | Jun 6–Jun 13 | Aug 25–Sep 1 |
| 4a & 4b | Mar 27–Apr 3 | May 22–May 29 | Aug 10–Aug 17 |
| 5a & 5b | Mar 22–Mar 29 | May 17–May 24 | Aug 5–Aug 12 |
| 6a & 6b | Mar 7–Mar 14 | May 2–May 9 | Jul 21–Jul 28 |
| 7a & 7b | Feb 20–Feb 27 | Apr 17–Apr 24 | Jul 6–Jul 13 |
| 8a & 8b | Feb 4–Feb 11 | Apr 1–Apr 8 | Jun 20–Jun 27 |
| 9a & 9b | Dec 28–Jan 4 | Feb 22–Mar 1 | May 13–May 20 |
| 10a & 10bSpring window (your zone) | Feb–Apr | Apr–Jun | ~80 days after transplanting |
| 11a & 11b | Nov 13–Nov 20 | Jan 8–Jan 15 | Mar 29–Apr 5 |
Bloom dates are about 80 days after the sow or plant-out date, not after starting seeds indoors.
Zone 2 sows before zone 3 here, which looks wrong and is not. USDA zones rank winter cold, not season length, and zone 2 is mostly interior Alaska, where hard winters come with warm summers. More on what a zone measures.
Good companions
No well-established companions for celosia.
Where to buy celosia seeds
Botanical Interests · True Leaf Market · Burpee · High Mowing Organic Seeds (each supplier's celosia seeds)
Varieties we recommend, and where to get them:
- Fresh Look series: A 2007 All-America Selections Flower Winner. AAS trials across North America found it heat, humidity, and rain tolerant, needing no deadheading, with plumes that stay colorful all season rather than browning with maturity, a low-maintenance pick. Buy: True Leaf Market Full notes
- New Look: A base-branching, dark-foliage type with large scarlet plumes that AAS notes hold their intense color longer than other celosia types. Buy: True Leaf Market Full notes
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing celosia" 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 →
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Growing Celosia in USDA zone 10b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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