Bells of Ireland in Zone 4a & 4b
Moluccella laevis
When to plant bells of ireland in zone 4b
Zones 4a and 4b share the same average frost dates in our data, so this page covers both.
Method: Either: Start indoors for an earlier harvest, or direct-sow outside for less fuss. Bells of Ireland tolerates either.
| Start indoors | Mar 27–Apr 3 |
|---|---|
| Direct sow / transplant outside | May 8–May 15 |
| Estimated bloom | Aug 6–Aug 13 (~90 days after planting) |
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 2-3 ft.
Bells of Ireland isn't grown for its flowers at all, really. The tiny white blooms tucked inside are almost beside the point; what the plant is grown for is the spike of pale, papery green calyxes surrounding them, which is what gives the cut stem its name and its appeal in arrangements.
How bells of ireland fits zone 4's season
Zone 4b's frost-free window runs about 128 days, from May 15 to September 20. Bells of Ireland needs about 90 days from sowing to first harvest.
Good companions
No standout companions recorded yet for Bells of Ireland.
Where to buy bells of ireland seeds
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See it growing
Search YouTube for "growing bells of ireland" 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 Bells of Ireland in USDA zone 4b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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