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.

When to Sow Sweet Corn in Wyoming

When to Sow Sweet Corn in Wyoming

Sweet corn goes into Wyoming soil once that soil, not the air, holds steady at 60°F, and that mark shows up weeks after the last spring frost has passed.

When to Sow Autumn Spinach in Wyoming

When to Sow Autumn Spinach in Wyoming

Sow autumn spinach in Wyoming between mid-July and mid-August, counting back 50 to 75 days from the first fall frost, which arrives statewide between…

Will Spinach Bolt Early in Wyoming?

Will Spinach Bolt Early in Wyoming?

Spinach in Wyoming almost always bolts before a gardener expects it to. The state’s long summer daylight, not brutal heat, does most of the damage, and…

When to Sow Parsnips in Wyoming

When to Sow Parsnips in Wyoming

Sow parsnips directly in the ground in Wyoming about two to three weeks before your local last spring frost, which falls between May 7 and May 18 at the…

Will Parsnips Sweeten in Wyoming?

Will Parsnips Sweeten in Wyoming?

Yes, Wyoming parsnips sweeten. The reference station in Cheyenne shows a coldest-month mean minimum of 18.1°F, which means frost isn’t a rare visitor…