State agricultural overview

Hawaii crop calendar.

Zone 11a
Range 9a to 13a
365-day season
Last frost January 1
First 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 & extension reference

Hawaii climate anchors.

Last frost

January 1

First frost

December 31

Growing season

365 days

Hardiness zone

11a

Hawaii county-level frost dates →University of Hawaii College of Tropical Agriculture →

Hawaii 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.

Start free trial →

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