Montana · zones 4a–5b
When to plant cherry tomatoes in Montana.
Sow or transplant between May 22 to Jul 22 in a typical year, keyed to Montana's median last frost around May 15. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Cherry Tomatoes dates for a typical Montana season.
1 · Start indoors
Apr 10 to Jun 10
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
May 22 to Jul 22
Keyed to the ~May 15 last frost. Sow 0.25" deep, 24" apart.
Harvest
~57 days later
~8 lb per plant over ~10 weeks.
Montana spans more than one climate: Zone 4 is the most common zone, but the state runs 4a to 5b. That's why the planner works from your ZIP code's frost dates, not your zone — mountain and coastal gardens in the same state can be three weeks apart.