Garden Pests in Wyoming: What Shows Up, When, and How to Stop It
A season-by-season look at the pests University of Wyoming Extension flags for home vegetable gardens, how to tell their damage apart, and what actually controls them.
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.
The Best Grass Seed for Wyoming Lawns
Cool-season grasses like Kentucky bluegrass and tall fescue suit Wyoming lawns, best seeded in late summer ahead of the first fall frost near Cheyenne.
Wyoming Lawn Care: What to Plant and When to Feed It
NOAA’s Cheyenne climate normals rule out warm-season grass, so Wyoming lawns run on cool-season species seeded a few weeks ahead of the first fall frost.
When to Plant Garlic in Wyoming: Counting Back From the First Frost
Wyoming garlic planting dates run early to mid-September, calculated from NOAA’s Cheyenne frost data and adjusted for elevation.
Garlic Varieties That Suit Wyoming Winters
Wyoming’s winter cold comfortably exceeds what garlic needs to clove, making hardneck varieties the reliable choice, with softnecks workable in milder pockets.
Growing Garlic in Wyoming: Planting Dates, Varieties and Winter Cold
Wyoming’s long winter clears the cold garlic needs, and the planting window, cultivar picks, and disease risk here follow from that fact.
Tomato Planting Dates in Wyoming: Counting Back From Your Frost Window
Wyoming tomato planting dates depend on counting backward from NOAA’s Cheyenne frost window, adjusted for your own county’s elevation and microclimate.
Tomato Pests in Wyoming: Which Ones Actually Show Up Here
A season-by-season rundown of the tomato pests that actually turn up in Wyoming gardens, from early cutworms to mid-summer blister beetles, and how to handle each one.
Tomato Varieties That Ripen in Time in Wyoming
Wyoming gardeners can use Cheyenne’s frost window and days-to-maturity figures to pick tomato varieties that ripen before the first fall freeze.
Growing Tomatoes in Wyoming: Planting Dates, Varieties and Local Pests
Wyoming’s tomato season is short and frost-prone, so this guide gives Cheyenne’s frost dates, matching varieties by days to maturity, and season-extension steps that make a harvest possible.