When to plant butternut squash in Wyoming

Butternut squash
Sow outdoors in Cheyenne
May 21–Jun 4

Across Wyoming the window opens between May 17 and June 14. Find your city below; the dates follow each town's own average last frost.

Sow outdoors, Cheyenne
May 21–Jun 4
Last sowing for a harvest
May 30
Last frost, Cheyenne
May 14

Sow outdoors 1–3 weeks after the last frost. Leave fruit on the vine until the skin is hard and the stem starts to dry.

Butternut squash planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
CheyenneMay 21–Jun 4
CasperMay 17–May 31
GilletteMay 22–Jun 5
LaramieJun 14–Jun 28
Rock SpringsMay 31–Jun 14
SheridanMay 28–Jun 11

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

Questions

When should I plant butternut squash in Wyoming?

In Cheyenne, sow outdoors from May 21 to June 4. Across Wyoming the window opens between May 17 and June 14, depending on the local last frost.

How is this date worked out?

Sow outdoors 1–3 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 butternut squash everywhere in Wyoming?

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

More for Wyoming

Butternut squash in other states

Frost dates for every city in Wyoming