Bield:Farm
State agricultural overview

Hawaii crop calendar.

Zone 11aRange 9a to 13a365-day seasonLast frost January 1First frost December 31

2 primary crops with planting windows for Hawaii. Calendar timing is anchored to 11a dominant hardiness zone and a 365-day growing season — verify against University of Hawaii College of Tropical Agriculture for variety- and county-specific guidance.

Row Crop · Hawaii

  • Corn
    limited
    Spring: January 1 – January 22
  • Grain Sorghum
    limited
    Spring: January 22 – February 19
  • Soybeans
    limited
    Spring: January 15 – February 5
  • Sunflowers
    limited
    Spring: January 8 – February 5
  • Cotton
    trial
    Spring: January 15 – February 5
  • Winter Wheat
    trial
    Fall: December 24 – January 14

Vegetables · Hawaii

  • Potatoes
    primary
    Spring: December 18 – January 8
    Fall: October 17 – November 1
  • Cucumbers
    secondary
    Spring: January 15 – February 19
  • Peppers
    secondary
    Spring: January 22 – February 12
  • Pumpkins
    secondary
    Spring: January 22 – February 19
  • Sweet Corn
    secondary
    Spring: January 1 – February 5
  • Tomatoes
    secondary
    Spring: January 15 – February 5

Forages · Hawaii

  • Clover
    primary
    Spring: December 11 – January 8
    Fall: November 1 – November 16
  • Alfalfa
    limited
    Spring: December 25 – January 22
    Fall: November 1 – November 16

Cover Crops · Hawaii

  • Brassicas
    secondary
    Fall: October 17 – November 1
  • Cereal Oats
    secondary
    Spring: December 25 – January 22
    Fall: November 1 – November 16
  • Buckwheat
    limited
    Spring: February 26 – March 25
  • Winter Rye
    limited
    Fall: December 24 – January 14

Frost-date reference — Hawaii

Last frost (spring)
January 1
First frost (fall)
December 31
Growing season
365 days
Hardiness zone
11a

Frost dates are NOAA / NCDC climate normals — county-level variation can shift these by 2–4 weeks. The Hawaii extension service publishes county-specific frost data: University of Hawaii College of Tropical Agriculture.

Hawaii 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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