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Variety fit — Ontario

Can I grow Shiro plum in Ontario?

The verdict

Yes

  • Your zone 6b and typical 1677 chill hours both suit this variety.

Based on Ontario’s main growing area (L2R): zone 6b, ~1,677 chill hours. Your exact site may differ — check your ZIP.

The numbers

Shiro requirements vs. Ontario climate
Shiro chill requirement400–500 chill hours
Shiro hardinessUSDA zones 5–9
Ontario average chill (L2R)1,677 hours (1,342–1,953 across 10 winters)
Ontario zone (L2R)USDA zone 6b
USDA pomological watercolor of Shiro plum
Prunus salicina: ShiroUSDA pomological watercolor, Mary Daisy Arnold, 1911 · USDA Pomological Watercolor Collection

Keep checking

Or the same verdict for another region:

Planting a Shiro in Ontario? Get its care calendar for your exact ZIP code, with email reminders.

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Questions

Can I grow Shiro plum in Ontario?
Yes — Your zone 6b and typical 1677 chill hours both suit this variety.

Sources

  1. [1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
  2. [2] Natural Resources Canada. Plant Hardiness Zones of Canada — accessed July 2026
  3. [3] Dave Wilson Nursery. Shiro Plum — variety specifications — accessed July 2026