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

The cutoff for planting cool-season grass is 6 weeks before the average first fall frost.

Dormant lawn seeding will create healthier, thicker grass in spring. Sow seeds in late fall or early winter once soil temperatures stay near 40 degrees Fahrenheit. Clear debris and use high-quality, ...