Transplant tomatoes into southeast Michigan gardens at the end of May, the Michigan State University Extension advises. Tomato plants grow best when the air temperature is at least 70 to 75 degrees Fahrenheit.
About this Author
Aileen Clarkson has been an award-winning editor and reporter for more than 20 years, earning three awards from the Society of Professional Journalists. She has worked for several newspapers, including "The Washington Post" and "The Charlotte Observer." Clarkson earned a Bachelor of Arts in journalism from the University of Florida.