FrostCal

When to Plant Zucchini in Michigan

In a typical Michigan location, start seeds indoors Apr 9 – Apr 16, then sow outdoors May 7 – May 21, then transplant outdoors May 7 – May 14. Across the state, the outdoor planting window starts as early as Apr 26 in Port Huron and as late as May 26 in Cadillac.

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
DetroitMar 31 – Apr 7Apr 28 – May 12Apr 28 – May 5
Grand RapidsApr 15 – Apr 22May 13 – May 27May 13 – May 20
WarrenMar 31 – Apr 7Apr 28 – May 12Apr 28 – May 5
Sterling HeightsApr 9 – Apr 16May 7 – May 21May 7 – May 14
Ann ArborApr 14 – Apr 21May 12 – May 26May 12 – May 19
LansingApr 10 – Apr 17May 8 – May 22May 8 – May 15
Clinton TownshipApr 9 – Apr 16May 7 – May 21May 7 – May 14
FlintApr 15 – Apr 22May 13 – May 27May 13 – May 20
DearbornApr 6 – Apr 13May 4 – May 18May 4 – May 11
LivoniaApr 10 – Apr 17May 8 – May 22May 8 – May 15
CantonApr 3 – Apr 10May 1 – May 15May 1 – May 8
TroyApr 5 – Apr 12May 3 – May 17May 3 – May 10
WestlandMar 30 – Apr 6Apr 27 – May 11Apr 27 – May 4
Farmington HillsApr 10 – Apr 17May 8 – May 22May 8 – May 15
KalamazooApr 7 – Apr 14May 5 – May 19May 5 – May 12
WaterfordApr 8 – Apr 15May 6 – May 20May 6 – May 13
WyomingApr 15 – Apr 22May 13 – May 27May 13 – May 20
ShelbyApr 5 – Apr 12May 3 – May 17May 3 – May 10
Rochester HillsApr 5 – Apr 12May 3 – May 17May 3 – May 10
SouthfieldApr 10 – Apr 17May 8 – May 22May 8 – May 15
West Bloomfield TownshipApr 8 – Apr 15May 6 – May 20May 6 – May 13
TaylorMar 30 – Apr 6Apr 27 – May 11Apr 27 – May 4
PontiacApr 5 – Apr 12May 3 – May 17May 3 – May 10
Saint Clair ShoresApr 8 – Apr 15May 6 – May 20May 6 – May 13
Royal OakMar 31 – Apr 7Apr 28 – May 12Apr 28 – May 5
NoviApr 10 – Apr 17May 8 – May 22May 8 – May 15
Dearborn HeightsApr 10 – Apr 17May 8 – May 22May 8 – May 15
Battle CreekApr 9 – Apr 16May 7 – May 21May 7 – May 14
KentwoodApr 15 – Apr 22May 13 – May 27May 13 – May 20
RedfordApr 10 – Apr 17May 8 – May 22May 8 – May 15

Showing the 30 most populous of 120 Michigan cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Michigan cities.

Frequently Asked Questions

When should I plant zucchini in Michigan?

In a typical Michigan location, start seeds indoors Apr 9 – Apr 16, then sow outdoors May 7 – May 21, then transplant outdoors May 7 – May 14. Across the state, the outdoor planting window starts as early as Apr 26 in Port Huron and as late as May 26 in Cadillac.

When is the last frost in Michigan?

The average last spring frost in Michigan ranges from April 19 in Port Huron to May 19 in Cadillac, 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 Michigan

When to plant zucchini in other states

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