Wax Begonia in Zone 3a & 3b
Begonia semperflorens
When to plant wax begonia in zone 3b
Zones 3a and 3b share the same average frost dates in our data, so this page covers both.
Method: Start indoors: Start indoors from seed, then transplant outside. Wax Begonia needs a head start most zones can't give it by direct-sowing alone.
| Start indoors | Mar 7–Mar 14 |
|---|---|
| Direct sow / transplant outside | Jun 13–Jun 20 |
| Estimated bloom | Sep 11–Sep 18 (~90 days after transplanting) |
Spacing: 2 per square foot (square-foot-gardening spacing). Mature height: 0.5-2 ft.
Wax begonia is the low, glossy-leaved bedding plant that flowers steadily from summer into autumn in shade.
How wax begonia fits zone 3's season
Zone 3b's frost-free window runs about 98 days, from May 30 to September 5. Wax Begonia needs about 90 days from transplant to first harvest.
Good companions
No standout companions recorded yet for Wax Begonia.
Where to buy wax begonia seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing wax begonia" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 3b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Wax Begonia in USDA zone 3b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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