FrostCal

When to Plant Zucchini in Maine

In a typical Maine location, start seeds indoors Apr 11 – Apr 18, then sow outdoors May 9 – May 23, then transplant outdoors May 9 – May 16. Across the state, the outdoor planting window starts as early as May 2 in Lewiston and as late as May 23 in Sanford.

Method Direct sow
Days to maturity 45–55 days

Fast-growing squash; direct sow 1-3 weeks after last frost, or start indoors 2-3 weeks early for a head start.

Zucchini Planting Dates by City

CityStart indoorsDirect sowTransplant
PortlandApr 5 – Apr 12May 3 – May 17May 3 – May 10
LewistonApr 4 – Apr 11May 2 – May 16May 2 – May 9
BangorApr 13 – Apr 20May 11 – May 25May 11 – May 18
West ScarboroughApr 5 – Apr 12May 3 – May 17May 3 – May 10
South PortlandApr 5 – Apr 12May 3 – May 17May 3 – May 10
South Portland GardensApr 5 – Apr 12May 3 – May 17May 3 – May 10
AuburnApr 4 – Apr 11May 2 – May 16May 2 – May 9
BiddefordApr 18 – Apr 25May 16 – May 30May 16 – May 23
SanfordApr 25 – May 2May 23 – Jun 6May 23 – May 30
SacoApr 18 – Apr 25May 16 – May 30May 16 – May 23
AugustaApr 6 – Apr 13May 4 – May 18May 4 – May 11
WestbrookApr 5 – Apr 12May 3 – May 17May 3 – May 10
WatervilleApr 11 – Apr 18May 9 – May 23May 9 – May 16
BrunswickApr 11 – Apr 18May 9 – May 23May 9 – May 16
York BeachApr 10 – Apr 17May 8 – May 22May 8 – May 15
Wells Beach StationApr 18 – Apr 25May 16 – May 30May 16 – May 23
OronoApr 10 – Apr 17May 8 – May 22May 8 – May 15
LisbonApr 24 – May 1May 22 – Jun 5May 22 – May 29
North BathApr 19 – Apr 26May 17 – May 31May 17 – May 24
BrewerApr 13 – Apr 20May 11 – May 25May 11 – May 18
Presque IsleApr 23 – Apr 30May 21 – Jun 4May 21 – 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 zucchini in Maine?

In a typical Maine location, start seeds indoors Apr 11 – Apr 18, then sow outdoors May 9 – May 23, then transplant outdoors May 9 – May 16. Across the state, the outdoor planting window starts as early as May 2 in Lewiston and as late as May 23 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 zucchini take to grow?

Zucchini typically take 45–55 days from planting to harvest. Fast-growing squash; direct sow 1-3 weeks after last frost, or start indoors 2-3 weeks early for a head start.

Other Crops in Maine

When to plant zucchini in other states

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