Variety fit — Ontario
Can I grow Chestnut Crab apple in Ontario?
The verdict
Not recommended
- Your zone 6b is warmer than this variety's range (zones 3–4); it may not receive reliable winter chilling.
Based on Ontario’s main growing area (L2R): zone 6b, ~1,677 chill hours. Your exact site may differ — check your ZIP.
The numbers
| Chestnut Crab hardiness | USDA zones 3–4 |
|---|---|
| Ontario average chill (L2R) | 1,677 hours (1,342–1,953 across 10 winters) |
| Ontario zone (L2R) | USDA zone 6b |
Better apple choices for Ontario
These meet Ontario’s chill hours and zone comfortably:
Keep checking
Or the same verdict for another region:
Questions
- Can I grow Chestnut Crab apple in Ontario?
- Probably not — Your zone 6b is warmer than this variety's range (zones 3–4); it may not receive reliable winter chilling.
Sources
- [1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
- [2] Natural Resources Canada. Plant Hardiness Zones of Canada — accessed July 2026
- [3] University of Minnesota Extension. Growing apples in the home garden — accessed July 2026