What USDA Hardiness zone is Boise, Idaho in?

There are 11 USDA hardiness zones. Idaho's USDA hardiness zone will vary, depending on where you live in the valley. For the Boise, Idaho area where we are located, our USDA hardiness zone is 6b. That's from -5 degrees below zero to 0 degrees. Some feel we belong in zone 7 while others feel USDA hardiness should be zone 5. In part, the particular part of town you live in may make a difference on your hardiness zone. Add to that, some gardening folks have great protection from the elements while others have little protection.

USDA HARDINESS ZONE

Fahrenheit

Zone 1 Below -50 Zone 6 -10 to -0 (Boise)

Zone 2 -50 to -40 Zone 7 0 to 10

Zone 3 -40 to -30 Zone 8 10 to 20

Zone 4 -30 to -20 Zone 9 20 to 30

Zone 5 -20 to -10 Zone 10 30 to 40

Boise is in hardiness zone 6b

Boise is sometimes listed as a Zone 7 - I have been in Boise for over 50 years and will advise you to stay away from zone 7 plants if you want them to come back the following year. We recommend using them in micro-climates in Boise and the surrounding areas or you intend them to be annuals (plants that may survive the spring and summer months).