When to plant green beans in Maine

Sow outdoors in Portland

May 3–May 24

Across Maine the window opens between May 2 and May 23. Find your city below; the dates follow each town's own average last frost.

Sow outdoors 1–4 weeks after the last frost. Bush beans ripen all at once, so sow a new row every two to three weeks.

Green beans planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost

JanFebMarAprMayJunJulAugSepOctNovDec

PortlandMay 3–May 24

LewistonMay 2–May 23

BangorMay 11–Jun 1

AuburnMay 2–May 23

SanfordMay 23–Jun 13

BiddefordMay 16–Jun 6

WestbrookMay 3–May 24

SacoMay 3–May 24

When should I plant green beans in Maine?

In Portland, sow outdoors from May 3 to May 24. Across Maine the window opens between May 2 and May 23, depending on the local last frost.

How is this date worked out?

Sow outdoors 1–4 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.