When to plant Turnips in Wyoming

In spring, from Apr 1 – June 1 in Casper to May 15 – June 15 in Laramie.

For a fall crop, from May 15 – June 15 in Jackson to June 1 – July 15 in Sheridan.

USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Turnips planting dates by place in Wyoming
PlaceSpringFall
CasperApr 1 – June 1June 1 – Aug 1
CheyenneApr 1 – June 1June 1 – Aug 1
CodyApr 1 – June 1June 1 – Aug 1
EvanstonMay 15 – June 15June 1 – July 1
GilletteApr 1 – June 1June 1 – Aug 1
Green RiverApr 15 – June 1June 1 – July 15
JacksonMay 15 – June 15May 15 – June 15
LaramieMay 15 – June 15May 15 – June 15
RivertonApr 1 – June 1June 1 – July 15
Rock SpringsApr 15 – June 1June 1 – July 15
SheridanApr 15 – June 1June 1 – July 15

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. The full USDA table for turnips.

Updated