Snapdragon in Zone 10a & 10b
Antirrhinum majus
When to plant snapdragon in zone 10b
Zones 10a and 10b share the same average frost dates in our data, so this page covers both.
Method: Start indoors: Start indoors from seed, then transplant outside. Snapdragon needs a head start most zones can't give it by direct-sowing alone.
| Window | Fall window |
|---|---|
| Start indoors | Jul–Dec |
| Direct sow / transplant outside | Sep–Feb |
| Estimated bloom | Nov 30–May 29 '27 (~90 days after transplanting) |
Spacing: 2 per square foot (square-foot-gardening spacing). Mature height: 1-3 ft.
Zone 10b dates sourced from growinginthegarden.com.
Snapdragons are one of the few flowers here that tolerate a light frost, which makes their planting window a little more forgiving than most, though the long indoor lead time before that still catches people off guard. What you're waiting for is a 1- to 3-foot spike of two-lipped, dragon-mouth blooms in almost any color you'd want.
How snapdragon fits zone 10's season
Zone 10b's frost-free window runs about 324 days, from January 30 to December 20. Snapdragon needs about 90 days from transplant to first harvest.
Good companions
No standout companions recorded yet for Snapdragon.
Where to buy snapdragon seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing snapdragon" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 10b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Snapdragon in USDA zone 10b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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