When to plant leeks in Idaho

Plant out in Boise City

Apr 10–Apr 24

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: Jan 30–Feb 13
Plant out, Boise City: Apr 10–Apr 24
Last frost, Boise City: Apr 24

Start seeds indoors 10–12 weeks before the last frost; plant out up to 2 weeks before the last frost. Plant leeks deep in a trench and fill it in as they grow to get long white stems.

Leeks planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost

JanFebMarAprMayJunJulAugSepOctNovDec

Boise CityApr 10–Apr 24

MeridianApr 10–Apr 24

NampaApr 15–Apr 29

CaldwellApr 15–Apr 29

Idaho FallsApr 25–May 9

PocatelloApr 18–May 2

Coeur d'AleneApr 8–Apr 22

Twin FallsApr 16–Apr 30

Post FallsApr 8–Apr 22

RexburgApr 28–May 12

LewistonMar 23–Apr 6

EagleApr 15–Apr 29

KunaApr 10–Apr 24

StarApr 15–Apr 29

AmmonApr 25–May 9

Questions

When should I plant leeks in Idaho?

In Boise City, plant out from April 10 to April 24. 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 10–12 weeks before the last frost; plant out up to 2 weeks before the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Idaho

Leeks in other states

Frost dates for every city in Idaho