Skip to content
EveryOrchard
Menu

Variety fit — Washington

Can I grow French Improved Prune plum in Washington?

The verdict

Yes

  • Your zone 7a and typical 2150 chill hours both suit this variety.

Based on Washington’s main growing area (98801): zone 7a, ~2,150 chill hours. Your exact site may differ — check your ZIP.

The numbers

French Improved Prune requirements vs. Washington climate
French Improved Prune chill requirement800 chill hours
Washington average chill (98801)2,150 hours (1,612–2,552 across 10 winters)
Washington zone (98801)USDA zone 7a
French Improved Prune plumSpecies illustration — no historical watercolor exists for this cultivar

Keep checking

Or the same verdict for another region:

Planting a French Improved Prune in Washington? Get its care calendar for your exact ZIP code, with email reminders.

Save this tree in My Orchard

Questions

Can I grow French Improved Prune plum in Washington?
Yes — Your zone 7a and typical 2150 chill hours both suit this variety.

Sources

  1. [1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
  2. [2] USDA / PRISM (Oregon State University). 2023 USDA Plant Hardiness Zone Map — accessed July 2026
  3. [3] Dave Wilson Nursery. French Improved Prune — DWN Variety Finder — accessed July 2026