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.
Home & garden, state by state
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.
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.
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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…
Wyoming’s benchmark soil, the Forkwood series, drains well, and that’s the only requirement Utah State University Extension sets for a bed that has to…
Plant asparagus crowns in Wyoming around early spring, timed to the tail end of the frost window that runs from about May 7 to May 18 across the state’s…
Heating season in Wyoming begins in September, when the average monthly temperature first drops below the 65°F threshold used to track heating demand.
In most of Wyoming, sweet corn can ripen, but only if you treat the season as short and unforgiving rather than assume it behaves like a Midwest garden.
Wyoming gardeners can grow asparagus successfully, but the real question isn’t whether the plant survives here.