Since 1972, Lawn Doctor has been serving Denver and surrounding communities, providing the absolutely best in lawn and tree care. Today, they expand on that great service by offering a new product that is safe for pets, children and our vulnerable Colorado watersheds. Lawn Doctor exclusively offers Proganix. Proganix, when applied to your lawn, contains the living microorganisms necessary to restore your soil back to the way Mother Nature intended. For a lush lawn, you have to start at the soil and Lawn Doctor does just that. If you care about the environment and having a beautiful lawn, your next call should be to Lawn Doctor.