Gardening in Wyoming

Everything we have worked out for Wyoming: what to plant and when, which varieties finish in time, the pests that actually turn up here, and the jobs that pay off month by month. We also cover the rest of the property, from lawns and soil to home care and energy, because a garden rarely stops at the vegetable bed.

The numbers first, because everything else follows from them. Measured at the weather station in Cheyenne, the last spring freeze runs May 7 to May 18 and the first fall freeze runs September 24 to October 5, USDA zones 3a-6a, 2,552 growing degree days in the year.

Garlic does well: 30.4 weeks below 40 °F, comfortably past the six it needs to form a proper head.

Elsewhere on the property in Wyoming: the pests that turn up here.

Figures from NOAA's 1991-2020 climate normals. A state is not one climate: elevation, a large lake or the coast can move these dates by two weeks either way, so check your own county with the extension service before you spend money.

What to Plant in Wyoming in September

What to Plant in Wyoming in September

September in Wyoming is a closing window, not an opening one. The state’s first fall frost lands between September 24 and October 5, so the first two or…

What to Plant in Wyoming in October

What to Plant in Wyoming in October

By October, most of Wyoming has already crossed its first fall frost. NOAA’s 30-year average puts that date between September 24 and October 5 for the…

What to Plant in Wyoming in November

What to Plant in Wyoming in November

November closes the outdoor planting season across nearly all of Wyoming. The state’s first fall frost typically arrives between September 24 and October…

What to Plant in Wyoming in May

What to Plant in Wyoming in May

Early May in Wyoming still sits inside the frost window in most counties, so the safe move is to fill beds with cold-hardy crops now and hold tender ones…

What to Plant in Wyoming in March

What to Plant in Wyoming in March

Across most of Wyoming, March is not a planting month for the open garden. The state’s last spring frost falls between May 7 and May 18, and at elevation…

What to Plant in Wyoming in June

What to Plant in Wyoming in June

Once the calendar turns to June, most of Wyoming has already cleared its frost window: the last spring freeze typically falls between May 7 and May 18…