When to plant swiss chard in Maine

Sow outdoors in Portland

Apr 12–May 10

Across Maine the window opens between April 11 and May 2. 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

PortlandApr 12–May 10

LewistonApr 11–May 9

BangorApr 20–May 18

South PortlandApr 12–May 10

AuburnApr 11–May 9

SanfordMay 2–May 30

BiddefordApr 25–May 23

WestbrookApr 12–May 10

SacoApr 12–May 10

When should I plant swiss chard in Maine?

In Portland, sow outdoors from April 12 to May 10. Across Maine the window opens between April 11 and May 2, 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.