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Sheridan, MT planting calendar

When to plant vegetables in Sheridan, MT (USDA hardiness zone 5a). Typical last spring frost around Jun 8, 2026 16 days year to year), first fall frost around Sep 2, 202612 days).

Playing it safe? Spring frost holds off until about Jun 28, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

Want exact dates for your address, a drag-and-drop bed layout, and reminders when it’s time to sow? Enter your ZIP:

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Month by month in Sheridan, MT

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May

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Understand your frost dates

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ZIP codes in Sheridan

59749

Frost dates are NOAA 1991–2020 climate normals for a representative location in Sheridan, MT (covering 1 ZIP); your exact dates depend on your address. Schedules are guidance, not guarantees.