Wax Begonia in Zone 4a & 4b
Begonia semperflorens
When to plant wax begonia 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. Wax Begonia needs a head start most zones can't give it by direct-sowing alone.
| Start indoors | Feb 20–Feb 27 |
|---|---|
| Direct sow / transplant outside | May 29–Jun 5 |
| Estimated bloom | Aug 27–Sep 3 (~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 4's season
Zone 4b's frost-free window runs about 128 days, from May 15 to September 20. 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 4b 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 4b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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