When to plant radishes in Idaho

Radishes
Sow outdoors in Boise City
Mar 20–May 1

Across Idaho the window opens between March 2 and April 7. Find your city below; the dates follow each town's own average last frost.

Sow outdoors, Boise City
Mar 20–May 1
Fall planting, Boise City
Sep 9–Sep 23
Last frost, Boise City
Apr 24

Sow outdoors from 5 weeks before to 1 weeks after the last frost; sow again for fall 4–6 weeks before the first frost. The fastest crop in the garden. Sow a short row every week in spring and fall.

Radishes planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
Boise CityMar 20–May 1
MeridianMar 20–May 1
NampaMar 25–May 6
CaldwellMar 25–May 6
Idaho FallsApr 4–May 16
PocatelloMar 28–May 9
Coeur d'AleneMar 18–Apr 29
Twin FallsMar 26–May 7
Post FallsMar 18–Apr 29
RexburgApr 7–May 19
LewistonMar 2–Apr 13
EagleMar 25–May 6
KunaMar 20–May 1
StarMar 25–May 6
AmmonApr 4–May 16

Questions

When should I plant radishes in Idaho?

In Boise City, sow outdoors from March 20 to May 1. Across Idaho the window opens between March 2 and April 7, depending on the local last frost.

How is this date worked out?

Sow outdoors from 5 weeks before to 1 weeks after the last frost; sow again for fall 4–6 weeks before the first frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Idaho

Radishes in other states

Frost dates for every city in Idaho