When to plant broccoli in Idaho

Plant out in Boise City

Mar 27–Apr 10

Across Idaho the window opens between March 9 and April 14. Find your city below; the dates follow each town's own average last frost.

Start indoors, Boise City: Feb 13–Feb 27
Plant out, Boise City: Mar 27–Apr 10
Fall planting, Boise City: Jul 29–Aug 12
Last frost, Boise City: Apr 24

Start seeds indoors 8–10 weeks before the last frost; plant out 2–4 weeks before the last frost; sow again for fall 10–12 weeks before the first frost. Broccoli grown for a fall harvest often tastes sweeter than spring broccoli. Light frost improves it.

Broccoli planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost

JanFebMarAprMayJunJulAugSepOctNovDec

Boise CityMar 27–Apr 10

MeridianMar 27–Apr 10

NampaApr 1–Apr 15

CaldwellApr 1–Apr 15

Idaho FallsApr 11–Apr 25

PocatelloApr 4–Apr 18

Coeur d'AleneMar 25–Apr 8

Twin FallsApr 2–Apr 16

Post FallsMar 25–Apr 8

RexburgApr 14–Apr 28

LewistonMar 9–Mar 23

EagleApr 1–Apr 15

KunaMar 27–Apr 10

StarApr 1–Apr 15

AmmonApr 11–Apr 25

Questions

When should I plant broccoli in Idaho?

In Boise City, plant out from March 27 to April 10. Across Idaho the window opens between March 9 and April 14, depending on the local last frost.

How is this date worked out?

Start seeds indoors 8–10 weeks before the last frost; plant out 2–4 weeks before the last frost; sow again for fall 10–12 weeks before the first frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Idaho

Broccoli in other states

Frost dates for every city in Idaho