Gardening in Michigan

Everything we have worked out for Michigan: 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 Detroit, the last spring freeze runs April 30 in the Detroit area; early to mid May across most of the Lower Peninsula and the first fall freeze runs October 6 to October 21, USDA zones 4a-6b, 3,248 growing degree days in the year.

Garlic does well: 26.1 weeks below 40 °F, comfortably past the six it needs to form a proper head.

Elsewhere on the property in Michigan: 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 Sow Sweet Corn in Michigan

When to Sow Sweet Corn in Michigan

Sweet corn in Michigan goes into the ground once soil hits 60 F, which lands in mid-to-late May across most of the Lower Peninsula and can slip into…

When to Sow Autumn Spinach in Michigan

When to Sow Autumn Spinach in Michigan

Sow autumn spinach in Michigan between mid-August and early September, counting back 50 to 75 days from the harvest you’re aiming for, before the first…

When to Sow Pumpkins in Michigan

When to Sow Pumpkins in Michigan

Michigan gardeners get one real shot at pumpkin timing, and for most of the Lower Peninsula that means sowing seed sometime between late May and the…

When to Sow Parsnips in Michigan

When to Sow Parsnips in Michigan

In most of Michigan, parsnip seed goes into the ground two to three weeks before the last spring frost, which lands around April 30 near Detroit and…