Variety fit — Alberta
Can I grow Shiro plum in Alberta?
The verdict
Not recommended
- Your zone 4a is colder than this variety's hardiness range (zones 5–9); winter cold may damage or kill the tree.
Based on Alberta’s main growing area (T2P): zone 4a, ~1,361 chill hours. Your exact site may differ — check your ZIP.
The numbers
| Shiro chill requirement | 400–500 chill hours |
|---|---|
| Shiro hardiness | USDA zones 5–9 |
| Alberta average chill (T2P) | 1,361 hours (999–1,619 across 10 winters) |
| Alberta zone (T2P) | USDA zone 4a |
Better plum choices for Alberta
These meet Alberta’s chill hours and zone comfortably:
Keep checking
Or the same verdict for another region:
Questions
- Can I grow Shiro plum in Alberta?
- Probably not — Your zone 4a is colder than this variety's hardiness range (zones 5–9); winter cold may damage or kill the tree.
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] Dave Wilson Nursery. Shiro Plum — variety specifications — accessed July 2026