The University of Illinois recommends planting grass seed starting in the middle of August through the middle of September. Grass seed will germinate and grow quickly in the cool, moist weather found during the fall season in Illinois.
About this Author
Jennifer Loucks has been writing since 2000. She previously worked as a technical writer for a software development company, creating software documentation, help documents and training curriculum. She now writes hobby-based articles on topics including cooking, gardening, sewing and running. Loucks holds a Bachelor of Science in animal science and business from the University of Wisconsin-River Falls.