 But you don't have to be on the ZAMZO's lawn program to use our lawn food. You can buy it one bag at a time. Then you need to make sure your lawn is getting the moisture it needs, which, depending on how hot it gets, can be up to one inch of water every two to three days. Also, you want to set your mower height to four inches. And if you really want your lawn to be healthy and look fabulous, apply some ZAMZO's Humigreen along with your ZAMZO's lawn food. The expert staff at ZAMZO's can answer all your questions.