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Planting calendar for ZIP 83631 (Idaho City, ID)

When to plant vegetables in Idaho City, ID (USDA hardiness zone 6b). Typical last spring frost around Jun 17, 2026 14 days year to year), first fall frost around Sep 5, 202611 days).

Playing it safe? Spring frost holds off until about Jul 4, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Idaho City, ID planting calendar for dates typical of the whole city.

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Month by month in Idaho City, ID

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 83631: NOAA 1991-2020 normals (USC00104442 IDAHO CITY, ID US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.