Larkspur in Zone 2a & 2b
Consolida ajacis
When to plant larkspur in zone 2b
Zones 2a and 2b 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.
| Start indoors | Not typically started indoors |
|---|---|
| Direct sow / transplant outside | Apr 22–Apr 29 |
| Estimated bloom | Jul 26–Aug 2 (~95 days after direct-sowing) |
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 3-4 ft.
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 2's season
Zone 2b's frost-free window runs about 104 days, from May 20 to September 1. Larkspur needs about 95 days from sowing to first harvest.
Good companions
No standout companions recorded yet for Larkspur.
Where to buy larkspur 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 2b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Larkspur in USDA zone 2b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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