In wet hydroseeding, shredded vegetation is mixed with water and then broadcast on the soil surface. Once applied, the grass seed dries, germinates, and grows naturally.
Dry hydroseeding is a method of preparing a soil surface for planting by applying a layer of dry material, such as sand or pea stone, to the soil surface.
Do you have to water hydroseed? You can just water it if you choose to do so, then you’re going to be fine. It has to be watered in the right way so that it works best.