Impatiens in Zone 10a & 10b
Impatiens walleriana
When to plant impatiens 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. Impatiens needs a head start most zones can't give it by direct-sowing alone.
| Start indoors | Nov 21–Nov 28 |
|---|---|
| Direct sow / transplant outside | Feb 13–Feb 20 |
| Estimated bloom | Apr 29–May 6 (~75 days after transplanting) |
Spacing: 2 per square foot (square-foot-gardening spacing). Mature height: 0.5-2 ft.
Impatiens flowers reliably in shade, which almost nothing else here does. It also carries a disease problem worth understanding before you plant a whole bed of it.
How impatiens fits zone 10's season
Zone 10b's frost-free window runs about 324 days, from January 30 to December 20. Impatiens needs about 75 days from transplant to first harvest.
Good companions
No standout companions recorded yet for Impatiens.
Where to buy impatiens seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing impatiens" 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 Impatiens in USDA zone 10b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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