When to plant spinach in Idaho

Spinach
Sow outdoors in Boise City
Mar 13–Apr 3

Across Idaho the window opens between February 23 and March 31. Find your city below; the dates follow each town's own average last frost.

Sow outdoors, Boise City
Mar 13–Apr 3
Fall planting, Boise City
Aug 26–Sep 9
Last frost, Boise City
Apr 24

Sow outdoors 3–6 weeks before the last frost; sow again for fall 6–8 weeks before the first frost. Spinach bolts as days lengthen. Early spring and fall are its seasons.

Spinach planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
Boise CityMar 13–Apr 3
MeridianMar 13–Apr 3
NampaMar 18–Apr 8
CaldwellMar 18–Apr 8
Idaho FallsMar 28–Apr 18
PocatelloMar 21–Apr 11
Coeur d'AleneMar 11–Apr 1
Twin FallsMar 19–Apr 9
Post FallsMar 11–Apr 1
RexburgMar 31–Apr 21
LewistonFeb 23–Mar 16
EagleMar 18–Apr 8
KunaMar 13–Apr 3
StarMar 18–Apr 8
AmmonMar 28–Apr 18

Questions

When should I plant spinach in Idaho?

In Boise City, sow outdoors from March 13 to April 3. Across Idaho the window opens between February 23 and March 31, depending on the local last frost.

How is this date worked out?

Sow outdoors 3–6 weeks before 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

Spinach in other states

Frost dates for every city in Idaho