Growing Garlic in Montana: Planting Dates, Varieties and Winter Cold
Montana’s cold winters suit hardneck garlic, and planting timed to the region’s first fall frost gives cloves enough chill to divide into full bulbs.
Gardening in Montana
Everything we have worked out for Montana: 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 Billings, the last spring freeze runs April 29 to May 10 and the first fall freeze runs October 1 to October 14, USDA zones 3a-6a, 2,855 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 Montana: 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.
Tomato Varieties That Ripen in Time in Montana
Montana’s short growing season limits which tomato varieties can ripen before frost, and this guide names cultivars proven to finish on time here.
Tomato Planting Dates in Montana: Counting Back From Your Frost Window
How to use Billings’ NOAA frost window to calculate seed-starting and transplant dates for tomatoes anywhere in Montana.
Tomato Pests in Montana: Which Ones Actually Show Up Here
A season-by-season look at the tomato pests that actually appear in Montana gardens, with identification tips, damage signs, and effective controls for each one.
Growing Tomatoes in Montana: Planting Dates, Varieties and Local Pests
Montana’s frost window, soil prep, disease-resistant varieties, and pest fixes for tomatoes, based on Billings climate normals and Montana State University Extension guidance.
Garden Pests in Montana: What Shows Up, When, and How to Stop It
Montana’s five key garden pests, from grasshoppers to stink bugs, identified by sight with damage signs, seasonal timing, and what actually controls them.