The best time to aerate is when your grass is actively growing—spring or fall in cool areas, and late spring in warm ones.

You can plant grass seed anytime during the growing season, but doing so in fall takes advantage of cooler temperatures and milder sun.

Growing new grass from seed requires patience. To be successful, you’ll need to prepare carefully, then water often and wait. With time, your efforts should result in a healthy, thriving lawn. So, how ...