Lavatera (Annual Mallow) in Zone 4a & 4b
Lavatera trimestris
When to plant lavatera (annual mallow) in zone 4b
Zones 4a and 4b share the same average frost dates in our data, so this page covers both.
Method: Direct sow: Direct-sow outside. Lavatera (Annual Mallow) doesn't transplant well, or doesn't need the extra time indoors.
| Start indoors | Not typically started indoors |
|---|---|
| Direct sow / transplant outside | May 15–May 22 |
| Estimated bloom | Aug 13–Aug 20 (~90 days after direct-sowing) |
Spacing: about 4 square feet per plant (square-foot-gardening spacing). Mature height: 2-4 ft.
Lavatera is the annual mallow, and the one that flowers properly in its first summer.
How lavatera (annual mallow) fits zone 4's season
Zone 4b's frost-free window runs about 128 days, from May 15 to September 20. Lavatera (Annual Mallow) needs about 90 days from sowing to first harvest.
Good companions
No standout companions recorded yet for Lavatera (Annual Mallow).
Where to buy lavatera seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing lavatera (annual mallow)" 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 Lavatera (Annual Mallow) in USDA zone 4b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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