State agricultural overview

Oregon crop calendar.

Zone 8a
Range 4b to 9b
185-day season
Last frost April 20
First frost October 20

13 primary crops with planting windows for Oregon. Calendar timing is anchored to 8a dominant hardiness zone and a 185-day growing season — verify against OSU Extension Service for variety- and county-specific guidance.

Row Crop · Oregon

Corn
primary
Spring: April 20 – May 11
Cotton
primary
Spring: May 4 – May 25
Grain Sorghum
primary
Spring: May 11 – June 8
Soybeans
primary
Spring: May 4 – May 25
Winter Wheat
primary
Fall: October 13 – November 3
Sunflowers
secondary
Spring: April 27 – May 25

Vegetables · Oregon

Cucumbers
primary
Spring: May 4 – June 8
Peppers
primary
Spring: May 11 – June 1
Pumpkins
primary
Spring: May 11 – June 8
Sweet Corn
primary
Spring: April 20 – May 25
Tomatoes
primary
Spring: May 4 – May 25
Potatoes
secondary
Spring: April 6 – April 27
Fall: August 6 – August 21

Forages · Oregon

Clover
primary
Spring: March 30 – April 27
Fall: August 21 – September 5
Alfalfa
secondary
Spring: April 13 – May 11
Fall: August 21 – September 5

Cover Crops · Oregon

Brassicas
primary
Fall: August 6 – August 21
Winter Rye
primary
Fall: October 13 – November 3
Buckwheat
secondary
Spring: June 15 – July 13
Cereal Oats
secondary
Spring: April 13 – May 11
Fall: August 21 – September 5

Frost & extension reference

Oregon climate anchors.

Last frost

April 20

First frost

October 20

Growing season

185 days

Hardiness zone

Oregon county-level frost dates →OSU Extension Service →

Oregon planting timing. Live alerts.

Bield: Farm ties weather and soil-temperature stations in your county to crop planting thresholds — get notified the day soil temp clears your target window.

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