FrostCal

When to Plant Sweet Potatoes in Wyoming

In a typical Wyoming location, plant outdoors May 31 – Jun 14. Across the state, the outdoor planting window starts as early as May 18 in Worland and as late as Jun 26 in Evanston. 1 city in Wyoming is essentially frost-free and can plant on a year-round schedule.

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
CheyenneMay 28 – Jun 11
CasperMay 24 – Jun 7
GilletteMay 29 – Jun 12
LaramieJun 21 – Jul 5
Rock SpringsJun 7 – Jun 21
SheridanJun 4 – Jun 18
Green RiverJun 7 – Jun 21
EvanstonJun 26 – Jul 10
RivertonMay 26 – Jun 9
JacksonFrost-free: year-round planting
CodyMay 26 – Jun 9
RawlinsMay 31 – Jun 14
LanderJun 1 – Jun 15
TorringtonMay 25 – Jun 8
DouglasJun 2 – Jun 16
PowellJun 2 – Jun 16
RanchettesMay 26 – Jun 9
WorlandMay 18 – Jun 1
BuffaloJun 7 – Jun 21
South GreeleyMay 28 – Jun 11

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

Frequently Asked Questions

When should I plant sweet potatoes in Wyoming?

In a typical Wyoming location, plant outdoors May 31 – Jun 14. Across the state, the outdoor planting window starts as early as May 18 in Worland and as late as Jun 26 in Evanston. 1 city in Wyoming is essentially frost-free and can plant on a year-round schedule.

When is the last frost in Wyoming?

The average last spring frost in Wyoming ranges from May 4 in Worland to June 12 in Evanston, 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 Wyoming

When to plant sweet potatoes in other states

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