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.

Potato Varieties That Suit Montana

Potato Varieties That Suit Montana

Montana’s growing season runs short and its soil warms fast once summer heat arrives, so the varieties that do well are early to mid-season types that…

What to Plant in Montana in September

What to Plant in Montana in September

September in Montana means garlic and shallots go into the ground, spring bulbs get tucked in for their winter nap, and cold frames start earning their…

What to Plant in Montana in May

What to Plant in Montana in May

Early May in Montana still sits inside the frost window for much of the state, so the safe planting list for this month splits in two: hardy crops that…

What to Plant in Montana in March

What to Plant in Montana in March

Direct answer: almost nothing goes into open Montana ground in March. NOAA’s 1991-2020 Climate Normals for Billings put the last spring freeze between…