When to plant swiss chard in Idaho

Sow outdoors in Boise City

Apr 10–May 8

Across Idaho the window opens between March 23 and April 28. Find your city below; the dates follow each town's own average last frost.

Sow outdoors from 2 weeks before to 2 weeks after the last frost. Cut outer leaves and the plant keeps going until hard frost.

Swiss chard planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost

JanFebMarAprMayJunJulAugSepOctNovDec

Boise CityApr 10–May 8

MeridianApr 10–May 8

NampaApr 15–May 13

CaldwellApr 15–May 13

Idaho FallsApr 25–May 23

PocatelloApr 18–May 16

Twin FallsApr 16–May 14

Post FallsApr 8–May 6

RexburgApr 28–May 26

LewistonMar 23–Apr 20

EagleApr 15–May 13

KunaApr 10–May 8

StarApr 15–May 13

AmmonApr 25–May 23

When should I plant swiss chard in Idaho?

In Boise City, sow outdoors from April 10 to May 8. Across Idaho the window opens between March 23 and April 28, depending on the local last frost.

How is this date worked out?

Sow outdoors from 2 weeks before to 2 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.