The mulch that offers growth medium for seed is the main key to hydroseeding effectiveness. The principle of hydroseeding is solely based on the application of the appropriate mixture rate to provide needed moisture retention for rapid seed germination, prevents seed dormancy through temperature insulation which thereby protects the area from erosion. Hydroseeding mulches do not consist of weed seed like straw or hay.

The principle of the different growing environment is based on the adjustment of various seed additives to suit the purpose of the allocated areas. It made use of less workforce compared to conventional seeding approaches as all the ingredients that are needed to be applied to the bed are mixed into the slurry and sprayed at the same time. Hydroseeding tends to become part of the soil by breaking down and blend with soil to germinate the needed lawn.