State agricultural overview

New Hampshire crop calendar.

Zone 5b
Range 3b to 6b
140-day season
Last frost May 15
First frost October 1

16 primary crops with planting windows for New Hampshire. Calendar timing is anchored to 5b dominant hardiness zone and a 140-day growing season — verify against UNH Cooperative Extension for variety- and county-specific guidance.

Row Crop · New Hampshire

Corn
primary
Spring: May 15 – June 5
Soybeans
primary
Spring: May 29 – June 19
Sunflowers
primary
Spring: May 22 – June 19
Winter Wheat
primary
Fall: September 24 – October 15
Grain Sorghum
secondary
Spring: June 5 – July 3
Cotton
trial
Spring: May 29 – June 19

Vegetables · New Hampshire

Cucumbers
primary
Spring: May 29 – July 3
Peppers
primary
Spring: June 5 – June 26
Potatoes
primary
Spring: May 1 – May 22
Fall: July 18 – August 2
Pumpkins
primary
Spring: June 5 – July 3
Sweet Corn
primary
Spring: May 15 – June 19
Tomatoes
primary
Spring: May 29 – June 19

Forages · New Hampshire

Alfalfa
primary
Spring: May 8 – June 5
Fall: August 2 – August 17
Clover
primary
Spring: April 24 – May 22
Fall: August 2 – August 17

Cover Crops · New Hampshire

Brassicas
primary
Fall: July 18 – August 2
Buckwheat
primary
Spring: July 10 – August 7
Cereal Oats
primary
Spring: May 8 – June 5
Fall: August 2 – August 17
Winter Rye
primary
Fall: September 24 – October 15

Frost & extension reference

New Hampshire climate anchors.

Last frost

May 15

First frost

October 1

Growing season

140 days

Hardiness zone

New Hampshire county-level frost dates →UNH Cooperative Extension →

New Hampshire 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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