When to plant peppers in Idaho

Peppers
Plant out in Boise City
May 8–May 22

Across Idaho the window opens between April 20 and May 26. 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
May 8–May 22
Last sowing for a harvest
Jul 9
Last frost, Boise City
Apr 24

Start seeds indoors 8–10 weeks before the last frost; plant out 2–4 weeks after the last frost. Peppers germinate slowly. A heat mat under the seed tray speeds them up.

Peppers planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
Boise CityMay 8–May 22
MeridianMay 8–May 22
NampaMay 13–May 27
CaldwellMay 13–May 27
Idaho FallsMay 23–Jun 6
PocatelloMay 16–May 30
Coeur d'AleneMay 6–May 20
Twin FallsMay 14–May 28
Post FallsMay 6–May 20
RexburgMay 26–Jun 9
LewistonApr 20–May 4
EagleMay 13–May 27
KunaMay 8–May 22
StarMay 13–May 27
AmmonMay 23–Jun 6

Questions

When should I plant peppers in Idaho?

In Boise City, plant out from May 8 to May 22. Across Idaho the window opens between April 20 and May 26, 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 after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Idaho

Peppers in other states

Frost dates for every city in Idaho