Answer: To maintain a thick, lush lawn, you'll need to water, mow and fertilize regularly (use a 3-1-2 ratio of NPK, and apply one pound of actual Nitrogen per 1000 sq.ft., in April, June, September and late November or early December). Along with that, lawns might need aeration if they're subject to heavy foot traffic which will compact the soil. Finally, thatching is important every few years. Dig a small square of turf and look at the blades, stems, stolons and roots. If you find more than 1/2"-3/4" of thatch built up over the soil surface, de-thatch your lawn. Then rake out the old stolons and other dead matter, reseed the bare spots and water well. New grass will appear in 7-14 days. While it's a lot of work to keep a lawn lush and thick, the rewards are great. And, a thick lawn will crowd out any weed seeds that try to germinate.
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