Columbine in Zone 4a & 4b
Aquilegia vulgaris
When to plant columbine in zone 4b
Zones 4a and 4b share the same average frost dates in our data, so this page covers both.
Method: Start indoors: Start indoors from seed, then transplant outside. Columbine needs a head start most zones can't give it by direct-sowing alone.
| Start indoors | Mar 13–Mar 20 |
|---|---|
| Direct sow / transplant outside | May 22–May 29 |
| Estimated bloom | May 21 '28–May 28 '28 (~365 days after transplanting) |
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 1.5-2.5 ft.
Columbine is a woodland-edge perennial known for its distinctive spurred flowers, which look almost architectural next to most garden blooms. It's an easy, long-lived plant once established, but like a lot of perennials grown from seed, it takes its time getting there.
How columbine fits zone 4's season
Zone 4b's frost-free window runs about 128 days, from May 15 to September 20. Columbine needs about 365 days from transplant to first harvest.
Good companions
No standout companions recorded yet for Columbine.
Where to buy columbine seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing columbine" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 4b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Columbine in USDA zone 4b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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