If you’re trying to sell your home, a healthy lawn can attract buyers — and even spur them to make a better offer. According to the Lawn Institute, a healthy lawn can help increase your home’s value by 15-20%. And the National Association of Realtors notes that when you invest in lawn care, you’ll see more than a 250% return on investment when you sell the home...

Maintaining a thick lawn means lots of plants — several million of them, in fact. In a well-maintained, 10,000 square foot lawn, you can expect to find about 8.5 million individual plants. That breaks down to about six plants per square inch, or 850 plants per square foot. Given that every grass seed only produces a single sprout, that’s a lot of seed to cover an entire lawn...