Frost Report

All states Idaho

Frost dates for Crouch, ID

When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.

Last spring frost

June 1

typical year

Safe to plant

June 20

frost is over in 9 of 10 years

First fall frost

September 10

typical year

Growing season

102 days

frost-free, typical year

When to plant

Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.

CropStart indoorsPlant outsideFall planting
Cool-season crops
Peas – May 4 – 18 –
Spinach – Apr 20 – May 11 Jul 16 – 30
Lettuce – May 4 – 25 Jul 16 – 30
Radishes – May 4 – Jun 15 Jul 30 – Aug 13
Onions – May 4 – 18 –
Potatoes Season usually too short. Try a quick variety or row covers.
Carrots – May 11 – Jun 1 Jun 18 – Jul 2
Beets – May 4 – 18 Jul 2 – 16
Kale Mar 23 – Apr 6 May 4 – 18 Jul 2 – 16
Broccoli Mar 23 – Apr 6 May 18 – Jun 1 Jul 2 – 16
Cabbage Mar 9 – 23 May 4 – 18 Jul 2 – 16
Garlic – – Jul 30 – Aug 20
Warm-season crops
Tomatoes Apr 25 – May 9 Jun 20 – Jul 4 –
Peppers Apr 18 – May 2 Jun 27 – Jul 11 –
Cucumbers – Jun 20 – Jul 11 –
Zucchini – Jun 20 – Jul 18 –
Pumpkins Season usually too short. Try a quick variety or row covers.
Green beans – Jun 20 – Jul 2 –
Sweet corn Season usually too short. Try a quick variety or row covers.
Basil May 16 – 30 Jun 27 – Jul 4 –

Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.

The year at a glance

Start indoors Plant outside Fall planting

The chance of frost, by date

1 year in 10Half of years9 years in 10
Spring frost after June 20June 1May 13
Fall frost before August 28September 10September 27

Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.

Hard freeze (28°F)

A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around May 11 (May 30 in a late year), and the first one in fall around September 24.

Towns that use these dates

This is the nearest NOAA station with frost records for 1 town.

Crouch

Where these dates come from

NOAA weather station GARDEN VALLEY, ID US (USC00103448), 1991–2020 climate normals. It's the nearest station for 3 zip codes, all within 10 miles:

83602, 83622, 83666

Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.