When to plant lettuce in Idaho

Plant out in Boise City

Apr 10–May 1

Across Idaho the window opens between March 23 and April 28. Find your city below; the dates follow each town's own average last frost.

Start indoors, Boise City: Feb 27–Mar 13
Plant out, Boise City: Apr 10–May 1
Sow outdoors, Boise City: Mar 27–May 1
Fall planting, Boise City: Aug 26–Sep 9
Last frost, Boise City: Apr 24

Start seeds indoors 6–8 weeks before the last frost; plant out from 2 weeks before to 1 weeks after the last frost; sow outdoors from 4 weeks before to 1 weeks after the last frost; sow again for fall 6–8 weeks before the first frost. Lettuce bolts in heat. Sow small batches every two weeks in spring and again in late summer.

Lettuce planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost

JanFebMarAprMayJunJulAugSepOctNovDec

Boise CityApr 10–May 1

MeridianApr 10–May 1

NampaApr 15–May 6

CaldwellApr 15–May 6

Idaho FallsApr 25–May 16

PocatelloApr 18–May 9

Coeur d'AleneApr 8–Apr 29

Twin FallsApr 16–May 7

Post FallsApr 8–Apr 29

RexburgApr 28–May 19

LewistonMar 23–Apr 13

EagleApr 15–May 6

KunaApr 10–May 1

StarApr 15–May 6

AmmonApr 25–May 16

Questions

When should I plant lettuce in Idaho?

In Boise City, plant out from April 10 to May 1. Across Idaho the window opens between March 23 and April 28, depending on the local last frost.

How is this date worked out?

Start seeds indoors 6–8 weeks before the last frost; plant out from 2 weeks before to 1 weeks after the last frost; sow outdoors from 4 weeks before to 1 weeks after the last frost; sow again for fall 6–8 weeks before the first frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Idaho

Lettuce in other states

Frost dates for every city in Idaho