What Grows in Great Falls, MT?
Great Falls on the eastern slopes of the Rockies has a shorter colder season but productive summers.
Zone
Last frost
First frost
Frost-free days
Great Falls is in USDA Zone 4b with about 128 frost-free days, and you can grow potatoes, beets, carrots, kale, and more here.
Planting tips for Great Falls
Cold high plains climate. Focus on fast-maturing varieties. Raised beds warm faster.
What to plant, and when
Timing by your frost dates — last frost May 15, first frost September 20.
Tomato, Cherry Tomato, Bell Pepper, Chili Pepper, Cucumber, Zucchini, Pumpkin, Basil
Lettuce, Spinach, Kale, Broccoli, Carrot, Radish, Beets, Onion
Green Beans, Potato, Corn, Microgreens, Rhubarb, Mint
Garlic
What grows well in Great Falls
Tomato
Grows well
Cherry Tomato
Grows well
Bell Pepper
Grows well
Chili Pepper
Grows well
Cucumber
Grows well
Zucchini
Grows well
Green Beans
Grows well
Lettuce
Grows well
Spinach
Grows well
Kale
Grows well
Broccoli
Grows well
Carrot
Grows well
Radish
Grows well
Beets
Grows well
Onion
Grows well
Garlic
Grows well
Potato
Grows well
Corn
Grows well
Peas
Grows well
Cabbage
Grows well
Brussels Sprouts
Grows well
Swiss Chard
Grows well
Arugula
Grows well
Microgreens
Grows well
Pumpkin
Grows well
Leek
Grows well
Asparagus
Grows well
Rhubarb
Grows well
Basil
Grows well
Mint
Grows wellBorderline — needs extra care
Frequently asked questions
What hardiness zone is Great Falls, MT in?
Great Falls, MT is in USDA Hardiness Zone 4b. This drives everything about what you can reliably grow — it maps directly to how cold your winters get.
When is the last frost in Great Falls?
The average last spring frost in Great Falls is around May 15, and the first fall frost is typically September 20. Plan to move tender plants outside after May 15 and have them harvested (or protected) before September 20.
What grows well in Great Falls?
Plenty — Great Falls's USDA Zone 4b climate supports 30+ crops. Some of the easiest and most reliable here are Cherry Tomato, Chili Pepper, Cucumber.
How long is Great Falls's growing season?
Great Falls typically has around 128 frost-free days per year (roughly May 15 to September 20). That's enough for most annual vegetables if you start warm-season crops indoors and stick to faster-maturing varieties for anything tender.
What should I plant first in Great Falls?
Go with fast-maturing crops to get a quick win while the season is short: Microgreens, Arugula, Radish are among the quickest from seed to harvest in Great Falls.
Can I grow vegetables in containers in Great Falls?
Yes — Great Falls's climate is container-friendly for the right crops. Tomato, Cherry Tomato, Bell Pepper all do well in pots, which also lets you start them a little earlier and move them in on cold nights.
When should I start seeds indoors in Great Falls?
For warm-season crops like Tomato, Cherry Tomato, Bell Pepper, start seeds indoors 6–8 weeks before your last frost (around May 15), then transplant after the danger of frost has passed.
What's tricky to grow in Great Falls?
A few crops need extra care in Great Falls's climate — Collard Greens, Blackberry, Pawpaw are borderline here and may need season extension (row covers, cold frames, or a head start indoors).