When to plant swiss chard in Montana

Sow outdoors in Billings

Apr 20–May 18

Across Montana the window opens between April 20 and May 30. 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

BillingsApr 20–May 18

MissoulaApr 26–May 24

Great FallsApr 22–May 20

BozemanMay 12–Jun 9

HelenaApr 25–May 23

KalispellMay 17–Jun 14

When should I plant swiss chard in Montana?

In Billings, sow outdoors from April 20 to May 18. Across Montana the window opens between April 20 and May 30, 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.