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Cobalt, ID planting calendar

When to plant vegetables in Cobalt, ID (USDA hardiness zone 5b). Typical last spring frost around May 17, 2026 14 days year to year), first fall frost around Sep 24, 202610 days).

Playing it safe? Spring frost holds off until about Jun 3, 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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Still time to plant

As of today, these crops can still reach harvest before Cobalt, ID’s first frost (~Sep 24, 2026) — fastest first.

Month by month in Cobalt, ID

February

March

April

May

June

July

August

Understand your frost dates

More Idaho planting calendars

ZIP codes in Cobalt

83229

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