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Planting calendar for ZIP 97035 (Lake Oswego, OR)

When to plant vegetables in Lake Oswego, OR (USDA hardiness zone 9a). Typical last spring frost around Apr 1, 2026 20 days year to year), first fall frost around Nov 6, 202617 days).

Playing it safe? Spring frost holds off until about Apr 26, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Lake Oswego, OR

January

February

March

April

May

August

September

Understand your frost dates

Frost dates for ZIP 97035: NOAA 1991-2020 normals (USC00350595 BEAVERTON 2 SSW, OR US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.