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.

When to Plant Onions in Montana

When to Plant Onions in Montana

Montana sits at 45.81 degrees north latitude at the reference station in Billings, where the longest day of the year delivers 15 hours and 32 minutes of…

The Best Onion Varieties for Montana

The Best Onion Varieties for Montana

Montana sits at 45.81 degrees north, the latitude of Billings, and on the longest day of the year that spot on the map gets 15 hours and 32 minutes of…

The Best Apple Varieties for Montana

The Best Apple Varieties for Montana

Montana’s harsh winters and short frost-free window narrow the realistic apple choices to hardiness-first picks, checked against NOAA and Montana State University Extension data.