When to plant sweet potatoes in Wyoming

Sweet potatoes
Plant out in Cheyenne
Jun 4–Jun 18

Across Wyoming the window opens between May 31 and June 28. Find your city below; the dates follow each town's own average last frost.

Plant out, Cheyenne
Jun 4–Jun 18
Last frost, Cheyenne
May 14

Plant out 3–5 weeks after the last frost. Set out slips when the soil is warm, around 65°F. They need a long, hot season.

Sweet potatoes planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
CheyenneJun 4–Jun 18
CasperMay 31–Jun 14
GilletteJun 5–Jun 19
LaramieJun 28–Jul 12
Rock SpringsJun 14–Jun 28
SheridanJun 11–Jun 25

In Laramie, Rock Springs, Sheridan the frost-free season is shorter than sweet potatoes need. Start plants indoors and pick early varieties.

Questions

When should I plant sweet potatoes in Wyoming?

In Cheyenne, plant out from June 4 to June 18. Across Wyoming the window opens between May 31 and June 28, depending on the local last frost.

How is this date worked out?

Plant out 3–5 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

Is the season long enough for sweet potatoes everywhere in Wyoming?

Not quite. In Laramie, Rock Springs, Sheridan the frost-free season is shorter than the time sweet potatoes need to ripen. Start plants indoors and pick an early variety.

More for Wyoming

Sweet potatoes in other states

Frost dates for every city in Wyoming