A U.S. map highlighting optimal fall grass seeding windows for lawn patching and overseeding. Areas in dark green indicate regions where seeding can be done now with a shorter window, while lighter green areas suggest a longer window toward late September for seeding. Yellow regions recommend waiting until September or October, and parts in beige indicate that other timing is better for seeding. In general, the top half of the country is a "seed now" color, while the bottom half has more time or should wait for another season.