Hydroseeding is the process of combining seed, mulch, fertilizer, and healthy soil amendments with water to mix in a HydroSeeder tank to form a thick slurry. This slurry is applied with pressure to the surface for seed germination and turf development. Hydroseeding is the fastest and most cost effective and highest quality method of seeding a lawn. Grass should start to grow within 7 days, and the new lawn will be well established within 4 weeks.