When to plant Green beans in Idaho

In spring, from Apr 10 – June 30 in Lewiston to May 15 – June 30 in Garden City.

In fall, from June 1 – July 10 in Ammon to July 1 – Aug 1 in Rathdrum.

USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Snap beans planting dates by place in Idaho
PlaceSpringFall
AmmonMay 10 – June 30June 1 – July 10
BlackfootMay 10 – June 30June 1 – July 10
Boise CityApr 25 – June 30July 1 – Aug 1
BurleyMay 10 – June 30June 1 – July 10
CaldwellMay 10 – June 30June 15 – July 20
ChubbuckMay 15 – June 30June 1 – July 10
Coeur d'AleneApr 25 – June 30July 1 – Aug 1
EagleMay 10 – June 30July 1 – Aug 1
Garden CityMay 15 – June 30June 15 – July 20
HaydenApr 25 – June 30July 1 – Aug 1
Idaho FallsMay 10 – June 30June 1 – July 10
JeromeMay 10 – June 30June 15 – July 20
KunaApr 25 – June 30July 1 – Aug 1
LewistonApr 10 – June 30July 1 – Aug 15
MeridianApr 25 – June 30July 1 – Aug 1
MiddletonMay 10 – June 30June 15 – July 20
MoscowMay 10 – June 30June 1 – July 10
Mountain HomeMay 10 – June 30June 15 – July 20
NampaMay 10 – June 30June 15 – July 20
PocatelloMay 10 – June 30June 15 – July 20
Post FallsApr 25 – June 30July 1 – Aug 1
RathdrumApr 25 – June 30July 1 – Aug 1
RexburgMay 10 – June 30June 1 – July 1
SandpointMay 10 – June 30June 1 – July 10
StarMay 10 – June 30June 15 – July 20
Twin FallsMay 10 – June 30June 15 – July 20

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for snap beans.