Hydroseeding (or hydraulic mulch seeding, hydro-mulching, hydraseeding) is a planting process that uses a slurry of seed and mulch. It is often used as an erosion control technique on construction sites, as an alternative to the traditional process of broadcasting or sowing dry seed.
The hydroseeding slurry is transported in a tank, either truck- or trailer-mounted and sprayed over prepared ground.
The slurry often has other ingredients including fertilizer, tackifying agents, fiber mulch, and green dye If planting a relatively large area, hydroseeding can be completed in a very short period of time. It can be very effective for hillsides and sloping lawns to help with erosion control and quick planting. Hydroseeding will typically cost less than planting with sod, but more than broadcast seeding. Results are often quick with high germination rates producing grass growth in about a week to 14 days and mowing maintenance beginning around 3 to 4 weeks from the date of application.