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Variety fit — Washington

Can I grow Key Lime citrus in Washington?

The verdict

Not recommended

  • Your zone 7a is colder than this variety's hardiness range (zones 8–11); winter cold may damage or kill the tree.

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

The numbers

Key Lime requirements vs. Washington climate
Key Lime hardinessUSDA zones 8–11
Washington average chill (98801)2,150 hours (1,612–2,552 across 10 winters)
Washington zone (98801)USDA zone 7a
USDA pomological watercolor of Key Lime citrus
Citrus aurantiifolia: KeyUSDA pomological watercolor, Mary Daisy Arnold, 1916 · USDA Pomological Watercolor Collection

Keep checking

Or the same verdict for another region:

Questions

Can I grow Key Lime citrus in Washington?
Probably not — Your zone 7a is colder than this variety's hardiness range (zones 8–11); winter cold may damage or kill the tree.

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] Four Winds Growers. Mexican Key Lime Tree — product page — accessed July 2026