Hydroseeding is a planting process. The seed, fertilizer, and mulch is combined with water to create a slurry. The slurry is then transported in a tank, either on a truck or trailer mounted and sprayed over prepared ground in a uniform layer.  

The mulch in the hydroseed mixture helps maintain the moisture level of the seed and seedlings. Any type of seed can be planted using the hydroseeding method. Other ingredients can be mixed into the slurry including lime, tackifying agents, green dye and other additives.

Hydroseeding is an alternative to the traditional process of broadcasting or sowing dry seed. It promotes quick germination and inhibits soil erosion. Starting a lawn by hydroseeding is considerably cheaper than laying sod and quicker than using seed only.

Hydroseeding is used to seed grass on commercial sites, roadsides, golf courses, lawns and areas too large, inaccessible or unsuitable for conventional methods. It is also used to spread mixtures of wildflowers or pasture grasses.