FrostCal

When to Plant Green Beans in Maine

In a typical Maine location, sow outdoors May 2 – May 16. Across the state, the outdoor planting window starts as early as Apr 25 in Lewiston and as late as May 16 in Sanford.

Method Direct sow
Days to maturity 50–65 days

Direct sow at last frost to 2 weeks after, once soil has warmed; frost-tender, do not rush.

Green Beans Planting Dates by City

CityDirect sow
PortlandApr 26 – May 10
LewistonApr 25 – May 9
BangorMay 4 – May 18
West ScarboroughApr 26 – May 10
South PortlandApr 26 – May 10
South Portland GardensApr 26 – May 10
AuburnApr 25 – May 9
BiddefordMay 9 – May 23
SanfordMay 16 – May 30
SacoMay 9 – May 23
AugustaApr 27 – May 11
WestbrookApr 26 – May 10
WatervilleMay 2 – May 16
BrunswickMay 2 – May 16
York BeachMay 1 – May 15
Wells Beach StationMay 9 – May 23
OronoMay 1 – May 15
LisbonMay 15 – May 29
North BathMay 10 – May 24
BrewerMay 4 – May 18
Presque IsleMay 14 – May 28

Showing the 21 most populous of 21 Maine cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Maine cities.

Frequently Asked Questions

When should I plant green beans in Maine?

In a typical Maine location, sow outdoors May 2 – May 16. Across the state, the outdoor planting window starts as early as Apr 25 in Lewiston and as late as May 16 in Sanford.

When is the last frost in Maine?

The average last spring frost in Maine ranges from April 25 in Lewiston to May 16 in Sanford, based on NOAA 1991–2020 climate normals.

How long do green beans take to grow?

Green Beans typically take 50–65 days from planting to harvest. Direct sow at last frost to 2 weeks after, once soil has warmed; frost-tender, do not rush.

Other Crops in Maine

When to plant green beans in other states

Related Guides