Answer: Kentucky bluegrass, perennial ryegrass, tall fescue and fine fescue are cool-season turfgrasses commonly used in Michigan. These grasses grow best when soil temperatures are between 50 and 65 degrees F and when air temperatures are between 60 and 75 degrees F. These conditions occur in both spring and fall in Michigan. Without irrigation, cool-season turfgrasses may become dormant during periods of hot or dry weather in the summer. For additional information, here's a brochure from Michigan State University: http://www.turf.msu.edu/docs/E2910.pdf
Best wishes with your lawn!
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