What Plants Grow Well In 59623?
The USDA hardiness zone is 5a in the 59623 zip code. This zone is a measure of the lowest temperature that a plant can survive, and helps determine what plants would grow best in the area's climate. Below you'll find a list of the best plants for 59623's climate based on this hardiness zone.
Learn more about climate conditions on our page for Helena's plant hardiness zone.
You can also look up the USDA growing zone for 59623 directly to see the temperature data behind these planting recommendations.

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Trees for 59623
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Vegetables for 59623

Planting Advice for 59623
Have questions about planting in 59623's climate? Check out our FAQ below for answers to common questions about growing plants in the area.
Zip code 59623 is in USDA hardiness zone 5a, which means plants there can survive temperatures as low as -20 to -15°F each year.
Best Time to Plant in Helena
Check the growing calendar for Helena at the Old Farmer's Almanac to see the best planting times for the region.

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Other Towns in Montana
We have plant recommendations for most towns in Montana. Select a town from the list below to find the best plants for your area based on the latest climate information.
Best Plants By State
Montana not the right state? We have plant recommendations for every state, town and zip code in the United States. Choose a state from the list below to find the best plants for your area.
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