FrostCal

When to Plant Sweet Potatoes in North Dakota

In a typical North Dakota location, plant outdoors May 24 – Jun 7. Across the state, the outdoor planting window starts as early as May 18 in Wahpeton and as late as Jun 4 in Beulah.

Method Plant out (slips, crowns, or tubers)
Days to maturity 90–120 days

Set out slips 2-4 weeks after last frost once soil is thoroughly warm (65F+); very frost/cold sensitive.

Sweet Potatoes Planting Dates by City

CityPlant outdoors
FargoMay 19 – Jun 2
BismarckMay 24 – Jun 7
Grand ForksMay 24 – Jun 7
MinotMay 24 – Jun 7
West FargoMay 24 – Jun 7
WillistonJun 4 – Jun 18
DickinsonJun 3 – Jun 17
MandanMay 27 – Jun 10
JamestownMay 22 – Jun 5
WahpetonMay 18 – Jun 1
Devils LakeMay 20 – Jun 3
Watford CityMay 23 – Jun 6
Valley CityMay 27 – Jun 10
Minot Air Force BaseMay 25 – Jun 8
GraftonMay 18 – Jun 1
LincolnMay 28 – Jun 11
BeulahJun 4 – Jun 18
RugbyMay 31 – Jun 14
StanleyMay 31 – Jun 14
HoraceMay 18 – Jun 1

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 sweet potatoes in North Dakota?

In a typical North Dakota location, plant outdoors May 24 – Jun 7. Across the state, the outdoor planting window starts as early as May 18 in Wahpeton and as late as Jun 4 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 sweet potatoes take to grow?

Sweet Potatoes typically take 90–120 days from planting to harvest. Set out slips 2-4 weeks after last frost once soil is thoroughly warm (65F+); very frost/cold sensitive.

Other Crops in North Dakota

When to plant sweet potatoes in other states

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