California Bluebell in Zone 10a & 10b
Phacelia campanularia
When to plant california bluebell in zone 10b
Zones 10a and 10b share the same average frost dates in our data, so this page covers both.
Method: Direct sow: Direct-sow outside. California Bluebell doesn't transplant well, or doesn't need the extra time indoors.
| Start indoors | Not typically started indoors |
|---|---|
| Direct sow / transplant outside | Jan 30–Feb 6 |
| Estimated bloom | Apr 10–Apr 17 (~70 days after direct-sowing) |
Spacing: 2 per square foot (square-foot-gardening spacing). Mature height: 1-2 ft.
California bluebell is a desert native that flowers hard for about a month and then finishes, which makes it a spring crop rather than a summer one.
How california bluebell fits zone 10's season
Zone 10b's frost-free window runs about 324 days, from January 30 to December 20. California Bluebell needs about 70 days from sowing to first harvest.
Good companions
No standout companions recorded yet for California Bluebell.
Where to buy california bluebell seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing california bluebell" 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 California Bluebell in USDA zone 10b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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