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Planting calendar for ZIP 97721 (Princeton, OR)

When to plant vegetables in Princeton, OR (USDA hardiness zone 6b). Typical last spring frost around May 29, 2026 16 days year to year), first fall frost around Sep 18, 202612 days).

Playing it safe? Spring frost holds off until about Jun 18, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Princeton, OR planting calendar for dates typical of the whole city.

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Month by month in Princeton, OR

February

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 97721: NOAA 1991-2020 normals (USC00355162 MALHEUR REFUGE HQ, OR US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.