You can grow palm trees in the warm areas of Washington state. Washington has a mild climate with western region located in an oceanic climate and eastern region located more in a continental climate. The state is divided by the Cascade Mountains. Average January temperatures in western region range between 20°F (–7°C) and 48°F (9°C) while average July temperatures range from 44°F (7°C) to 80°F (27°C). In the eastern region average January temperatures range from 8°F to 40°F (–13°C to 4°C) while July temperatures range from 48°F to 92°F (9°C to 33°C).
The state gets on average between 11.4 in to 49.4 in (29 cm to 125.5 cm) of snow annually. October through March the state experiences heavy rains. The warmest temperature ever recorded was 118°F (48°C) and the lowest was –48°F (–44°C). Washington USDA hardiness zones range from 4a to 9a.
Washington USDA Zones
Growing Palm Trees in Washington
There are a lot of cold hardy palms that can grow in the zones 8 and 9 of Washington state. Here are palm trees that can grow in Washington:
- California Fan Palm Tree – Zones 8b -11 (15 to 20 F)
- Canary Island Date Palm Tree – Zones 8b -11 (15 to 20 F)
- Chinese Fan Palm Tree – Zones 8a – 11 (10 to 15 F)
- True Date Palm Tree – Zones 8b -11 (15 to 20 F)
- European Fan Palm Tree – Zones 7b – 11 (5 to 10 F)
- Mexican Fan Palm Tree – Zones 8b -11 (15 to 20 F)
- Queen Palm Tree – Zones 8b -11 (15 to 20 F)
- Saw Palmetto Palm Tree – Zones 7a -11 (0 to 5 F)
- Silver Saw Palmetto Palm Tree – Zones 7a – 11 (0 to 5 F)
Major Cities in Washington
Bellevue – Hardiness Zone 9a
Seattle – Hardiness Zone 9a
Spokane – Hardiness Zone 5a
Tacoma – Hardiness Zone 9a
Vancouver – Hardiness Zone 7b
Yakima – Hardiness Zone 5b
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