Tomato Planting Dates in Michigan: Counting Back From Your Frost Window
Michigan’s tomato transplant window runs from late April near Detroit to mid May statewide, based on MSU Extension frost data and each cultivar’s days to maturity.
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.
Growing Tomatoes in Michigan: Planting Dates, Varieties and Local Pests
Michigan’s tomato planting window runs from late April in Detroit to early May statewide, with variety choice and hardening off both critical to success.