 What's more, ZAMZO's Humigreen is biologically correct, so it's worry-free and friendly to kids, pets, and our environment. Plus, Humigreen adds carbon to the soil and rich humus that helps your soil retain moisture, allowing you to water less, which saves money and helps to preserve an important natural resource. Remember, you can apply ZAMZO's Humigreen one bag at a time or as part of our annual lawn program. So why settle for a lighter shade of green when your lawn can be a deep, dark Humigreen?