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Planting calendar for ZIP 97258 (Portland, OR)

When to plant vegetables in Portland, OR (USDA hardiness zone 9a). Typical last spring frost around Mar 26, 2026 (±21 days year to year), first fall frost around Nov 17, 2026 (±18 days).

Playing it safe? Spring frost holds off until about Apr 21, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

Turn these dates into a plan: lay out your beds, place each crop on its sow and transplant dates, and get a reminder when it’s time. Free on one garden, no credit card.

Plan my garden for 97258

Month by month in Portland, OR

January

February

March

April

May

September

December

Understand your frost dates

Where these dates come from

Frost dates for ZIP 97258 come from NOAA 1991-2020 normals (USC00358634 TROUTDALE, OR US). You can look up that station’s record yourself.

Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.