Bield:Farm
State agricultural overview

Washington crop calendar.

Zone 8aRange 4b to 9a195-day seasonLast frost April 15First frost October 25

13 primary crops with planting windows for Washington. Calendar timing is anchored to 8a dominant hardiness zone and a 195-day growing season — verify against WSU Extension for variety- and county-specific guidance.

Row Crop · Washington

Vegetables · Washington

  • Cucumbers
    primary
    Spring: April 29 – June 3
  • Peppers
    primary
    Spring: May 6 – May 27
  • Pumpkins
    primary
    Spring: May 6 – June 3
  • Sweet Corn
    primary
    Spring: April 15 – May 20
  • Tomatoes
    primary
    Spring: April 29 – May 20
  • Potatoes
    secondary
    Spring: April 1 – April 22
    Fall: August 11 – August 26

Forages · Washington

  • Clover
    primary
    Spring: March 25 – April 22
    Fall: August 26 – September 10
  • Alfalfa
    secondary
    Spring: April 8 – May 6
    Fall: August 26 – September 10

Cover Crops · Washington

  • Brassicas
    primary
    Fall: August 11 – August 26
  • Winter Rye
    primary
    Fall: October 18 – November 8
  • Buckwheat
    secondary
    Spring: June 10 – July 8
  • Cereal Oats
    secondary
    Spring: April 8 – May 6
    Fall: August 26 – September 10

Frost-date reference — Washington

Last frost (spring)
April 15
First frost (fall)
October 25
Growing season
195 days
Hardiness zone
8a

Frost dates are NOAA / NCDC climate normals — county-level variation can shift these by 2–4 weeks. The Washington extension service publishes county-specific frost data: WSU Extension.

Washington soil-temp alerts.

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

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