FrostCal

When to Plant Zucchini in North Dakota

In a typical North Dakota location, start seeds indoors Apr 19 – Apr 26, then sow outdoors May 17 – May 31, then transplant outdoors May 17 – May 24. Across the state, the outdoor planting window starts as early as May 11 in Wahpeton and as late as May 28 in Beulah.

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
FargoApr 14 – Apr 21May 12 – May 26May 12 – May 19
BismarckApr 19 – Apr 26May 17 – May 31May 17 – May 24
Grand ForksApr 19 – Apr 26May 17 – May 31May 17 – May 24
MinotApr 19 – Apr 26May 17 – May 31May 17 – May 24
West FargoApr 19 – Apr 26May 17 – May 31May 17 – May 24
WillistonApr 30 – May 7May 28 – Jun 11May 28 – Jun 4
DickinsonApr 29 – May 6May 27 – Jun 10May 27 – Jun 3
MandanApr 22 – Apr 29May 20 – Jun 3May 20 – May 27
JamestownApr 17 – Apr 24May 15 – May 29May 15 – May 22
WahpetonApr 13 – Apr 20May 11 – May 25May 11 – May 18
Devils LakeApr 15 – Apr 22May 13 – May 27May 13 – May 20
Watford CityApr 18 – Apr 25May 16 – May 30May 16 – May 23
Valley CityApr 22 – Apr 29May 20 – Jun 3May 20 – May 27
Minot Air Force BaseApr 20 – Apr 27May 18 – Jun 1May 18 – May 25
GraftonApr 13 – Apr 20May 11 – May 25May 11 – May 18
LincolnApr 23 – Apr 30May 21 – Jun 4May 21 – May 28
BeulahApr 30 – May 7May 28 – Jun 11May 28 – Jun 4
RugbyApr 26 – May 3May 24 – Jun 7May 24 – May 31
StanleyApr 26 – May 3May 24 – Jun 7May 24 – May 31
HoraceApr 13 – Apr 20May 11 – May 25May 11 – May 18

Showing the 20 most populous of 20 North Dakota cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all North Dakota cities.

Frequently Asked Questions

When should I plant zucchini in North Dakota?

In a typical North Dakota location, start seeds indoors Apr 19 – Apr 26, then sow outdoors May 17 – May 31, then transplant outdoors May 17 – May 24. Across the state, the outdoor planting window starts as early as May 11 in Wahpeton and as late as May 28 in Beulah.

When is the last frost in North Dakota?

The average last spring frost in North Dakota ranges from May 4 in Wahpeton to May 21 in Beulah, 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 North Dakota

When to plant zucchini in other states

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