Hydroseeding machines vary from large trucks to
trailers, but they all have a water tank with an agitator and are capable of
mixing grass seed, fertilizer, and paper mulch with water to be sprayed
on the planting area. Getting the seed wet right from the start speeds
seed germination since seed begins to absorb moisture in a process
is sprayed onto a new lawn area or slope that's been finish graded. The paper
fiber mulch usually has a green coloration to help the applicator tell
visually where he's already sprayed. Interstate highway slopes in
Pennsylvania are commonly hydroseeded with crown vetch due to its
aggressiveness and low maintenance characteristic.
Larger truck mounted hydroseeding units have a catwalk on top where an
applicator can shoot the mix from a water cannon while an assistant drives and
repositions the truck as needed. Smaller towed trailer hydroseed
a long hose used by an applicator to 'spray paint' new lawns and slopes.