Bield:Farm
State agricultural overview

South Dakota crop calendar.

Zone 4bRange 3b to 5a130-day seasonLast frost May 15First frost September 25

13 primary crops with planting windows for South Dakota. Calendar timing is anchored to 4b dominant hardiness zone and a 130-day growing season — verify against SDSU Extension for variety- and county-specific guidance.

Row Crop · South Dakota

Vegetables · South Dakota

  • Cucumbers
    primary
    Spring: May 29 – July 3
  • Peppers
    primary
    Spring: June 5 – June 26
  • Potatoes
    primary
    Spring: May 1 – May 22
    Fall: July 12 – July 27
  • Pumpkins
    primary
    Spring: June 5 – July 3
  • Sweet Corn
    primary
    Spring: May 15 – June 19
  • Tomatoes
    primary
    Spring: May 29 – June 19

Forages · South Dakota

  • Alfalfa
    primary
    Spring: May 8 – June 5
    Fall: July 27 – August 11
  • Clover
    primary
    Spring: April 24 – May 22
    Fall: July 27 – August 11

Cover Crops · South Dakota

  • Brassicas
    primary
    Fall: July 12 – July 27
  • Buckwheat
    primary
    Spring: July 10 – August 7
  • Cereal Oats
    primary
    Spring: May 8 – June 5
    Fall: July 27 – August 11
  • Winter Rye
    primary
    Fall: September 18 – October 9

Frost-date reference — South Dakota

Last frost (spring)
May 15
First frost (fall)
September 25
Growing season
130 days
Hardiness zone
4b

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

South Dakota 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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