glenB,i'm not sure if hydroseeding is what you call it,but i had a company come out and spray my levee with (fertiziler,2 types of seed,water and paper)they shot it out of a gun and when finished the dirt was green,anyway if this is what your asking i paid $1,500.00 to spray about 700-800' of levee and the grass grew in about 10 days.