FrostCal

When to Plant Lettuce in Idaho

In a typical Idaho location, sow outdoors Apr 2 – Apr 16. Across the state, the outdoor planting window starts as early as Mar 9 in Lewiston and as late as Apr 19 in Eagle. For a fall crop, plant around Aug 19 – Sep 2. 2 cities in Idaho are essentially frost-free and can plant on a year-round schedule.

Method Direct sow
Days to maturity 45–60 days

Cold-hardy; direct sow 2-4 weeks before last frost. Also transplantable from indoor starts.

Lettuce Planting Dates by City

CityDirect sowFall planting
BoiseMar 27 – Apr 10Aug 26 – Sep 9
MeridianMar 27 – Apr 10Aug 26 – Sep 9
NampaApr 1 – Apr 15Aug 18 – Sep 1
Idaho FallsApr 11 – Apr 25Aug 6 – Aug 20
PocatelloApr 4 – Apr 18Aug 16 – Aug 30
CaldwellMar 26 – Apr 9Aug 23 – Sep 6
Coeur d'AleneMar 25 – Apr 8Aug 23 – Sep 6
Twin FallsApr 2 – Apr 16Aug 14 – Aug 28
LewistonMar 9 – Mar 23Aug 31 – Sep 14
Lewiston OrchardsMar 9 – Mar 23Aug 31 – Sep 14
Post FallsMar 25 – Apr 8Aug 23 – Sep 6
RexburgApr 17 – May 1Jul 29 – Aug 12
MoscowFrost-free: year-round planting
EagleApr 19 – May 3Aug 17 – Aug 31
CondaFrost-free: year-round planting
KunaMar 27 – Apr 10Aug 26 – Sep 9
AmmonApr 11 – Apr 25Aug 6 – Aug 20
ChubbuckApr 4 – Apr 18Aug 16 – Aug 30
HaydenMar 25 – Apr 8Aug 23 – Sep 6
Mountain HomeApr 4 – Apr 18Aug 13 – Aug 27
BlackfootApr 7 – Apr 21Aug 8 – Aug 22
Garden CityMar 27 – Apr 10Aug 26 – Sep 9
JeromeApr 4 – Apr 18Aug 19 – Sep 2
BurleyApr 9 – Apr 23Aug 9 – Aug 23

Showing the 24 most populous of 24 Idaho cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Idaho cities.

Frequently Asked Questions

When should I plant lettuce in Idaho?

In a typical Idaho location, sow outdoors Apr 2 – Apr 16. Across the state, the outdoor planting window starts as early as Mar 9 in Lewiston and as late as Apr 19 in Eagle. For a fall crop, plant around Aug 19 – Sep 2. 2 cities in Idaho are essentially frost-free and can plant on a year-round schedule.

When is the last frost in Idaho?

The average last spring frost in Idaho ranges from April 6 in Lewiston to May 17 in Eagle, based on NOAA 1991–2020 climate normals.

How long do lettuce take to grow?

Lettuce typically take 45–60 days from planting to harvest. Cold-hardy; direct sow 2-4 weeks before last frost. Also transplantable from indoor starts.

Other Crops in Idaho

When to plant lettuce in other states

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