Idaho Palm Trees
Some cold hardy palm trees can be grown in warm areas of Idaho. Idaho has a continental climate with hot summers and cold winters. The average temperature in Boise city in January is 29°F (–2°C) and 74°F (23°C) in July. The humidity levels are generally low across the state.
Idaho USDA hardiness zones range from 2b to 7a. The highest temperature ever recorded was 118 °F (48 °C) and the lowest was −60 °F (−51 °C). In the winter on average it gets about 20 in (51 cm).
Idaho USDA Zones
Growing Palm Trees in Idaho
Only cold hardy palm trees will grow in Idaho. Providing a cover and creating a microclimate can dramatically increase the list of palms that will grow in your area.
- European Fan Palm Tree – Zones 7b-11 (5 to 10 F)
- Pindo Palm Tree – Zones 7b-11 (5 to 10 F)
- Sago Palm Tree – Zones 7b-11 (5 to 10 F)
- Saw Palmetto Palm Tree – Zones 7a-11 (0 to 5 F)
- Windmill Palm Tree – Zones 7b-11 (5 to 10 F)
More Palm Trees»
Major Cities in Idaho
Boise – Hardiness Zone 6a
Pocatello – Hardiness Zone 4b
Twin Falls – Hardiness Zone 6a
A lot of palm trees die from fertilizer root burn and nutritional deficiencies. To avoid these problems, use fertilizer that has continues release formula, which feeds your palm tree for few months, rather than using a cheap fertilizer that will wash away after 2-3 rains.
I personally use 
It is time to protect your palm trees from cold! To avoid the cold damage, I spray my palms with 
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