Larkspur in Zone 10a & 10b

Consolida ajacis

When to plant larkspur 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. Larkspur doesn't transplant well, or doesn't need the extra time indoors.

Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 3-4 ft.

Zone 10b dates sourced from growinginthegarden.com.

Larkspur is one of the few flowers on this site that flatly refuses to be transplanted. It has to be direct-sown, and the seed won't germinate at all unless it's cold and kept dark, which puts it on the opposite schedule from most annuals people start indoors under lights. Get the timing right and it rewards you with tall, dense spires of bloom; get it wrong and the seed just sits in the ground doing nothing.

How larkspur fits zone 10's season

Zone 10b's frost-free window runs about 324 days, from January 30 to December 20. Larkspur needs about 95 days from sowing to first harvest.

Good companions

No standout companions recorded yet for Larkspur.

Where to buy larkspur seeds

• Botanical Interests
• True Leaf Market
• Burpee
• High Mowing Organic Seeds

See why we recommend these suppliers →

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See it growing

Search YouTube for "growing larkspur" 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 Larkspur in USDA zone 10b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.

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