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Planting calendar for ZIP 97029 (Grass Valley, OR)

When to plant vegetables in Grass Valley, OR (USDA hardiness zone 7a). Typical last spring frost around May 15, 2026 15 days year to year), first fall frost around Oct 11, 202611 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.

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

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Month by month in Grass Valley, OR

February

March

April

May

June

July

August

Understand your frost dates

Frost dates for ZIP 97029: NOAA 1991-2020 normals (USC00354411 KENT, OR US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.