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Zone 3a planting calendar

When to start vegetables in USDA hardiness zone 3a. Typical last spring frost around May 21, 2026 10 days year to year), first fall frost around Sep 22, 202611 days). Based on 24 ZIP codes in the zone — exact dates vary by location.

Playing it safe? Spring frost holds off until about Jun 2, 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:

Or get a printable 3a calendar and sowing reminders by email:

Still time to plant

As of today, these crops can still reach harvest before zone 3a’s first frost (~Sep 22, 2026) — fastest first.

Month by month in zone 3a

February

March

April

May

June

July

Frost dates are NOAA 1991–2020 climate normals for a representative location (ZIP 99602) in zone 3a; your exact dates depend on your address. Schedules are guidance, not guarantees.