When to plant peanut in Portland, Oregon
February 25 – March 11
Direct-sow outdoors · typical Portland yearClimate basis: NOAA station Portland Kgw-tv, OR (USC00356749), 1 mi (1 km) from downtown Portland (ZCTA 97204 centroid), elevation 159 ft, on the 1991–2020 climate normals. Direct-sow peanut from approximately the dates above, anchored to the median last spring 32°F freeze (February 25). One year in ten still freezes after March 21.
The Portland year
- indoors under lights
- in the garden
- frost-free season
- 1-in-10 years still freeze to Mar 21
Every method, with its sources
Direct-sow outdoors
Feb 25 – Mar 11Utah State Extension ties the peanut sowing trigger directly to the frost anchor — sow when soil temperatures are above 65°F, which it says is usually around the last frost — so the point rule opens the window at the last-frost date and runs 14 days. No source in this set offered an earlier-starting alternative to reconcile against. Anchored to the median last spring freeze (Feb 25). Utah State University Extension
Start seeds indoors
Not calculatedThe cited extension guides do not time an indoor seed-starting window for this crop.
Transplant outdoors
Not calculatedThe cited extension guides do not time an outdoor transplanting window for this crop.
Fall planting
Not calculatedNo source-backed fall planting rule exists for this crop in the registry, so no fall window is calculated.
Variety assumption: Assumes a shorter-season Spanish or Valencia type sown in place; Arkansas Extension notes peanuts need a minimum of 120 frost-free days, so the crop is only viable where the anchor-to-anchor season exceeds that.
These windows describe typical years (1991–2020 climate normals), not this year's forecast. Freezes happen outside them — especially in frost pockets, valleys, and urban edges. Watch the forecast before committing tender plants.
Crop rule sources (1)
- Utah State University Extension: Peanuts in the Garden (accessed 2026-07-25)"Sow seeds 1½ inches deep, 18 inches apart, with 4 seeds per mound when soil temperatures are above 65° F (usually around the last frost)."