Hydro Mousse Hydro Mousse Liquid Lawn System Review

Our Verdict

Start with what it is, because the name misleads. Penn State describes hydroseeding as seed, fertilizer and mulch sprayed as a slurry held together by a tackifier — an organic-based glue — so the seed stays put and the mulch holds moisture around it. This is a hose-end canister that sprays seed, fertilizer and a soil conditioner tinted green. There is no mulch layer, which is the component doing the work in real hydroseeding. So treat it as coloured seed, not as a small hydroseeder. What the dye genuinely buys you is coverage you can see: on a small bare patch, hand-broadcasting is guesswork and thin spots are invisible until they fail to germinate. That is a real problem and this solves it. What it does not buy you is less work — the manufacturer's own instruction is to water 2 to 3 times a day for the first 3 weeks, which is the same discipline every extension programme gives for any new seeding. And the arithmetic is unkind: a kit covers up to 100 sq ft for around forty dollars, where a bag of patch mix covers similar ground for a third of that and includes the mulch this lacks. One more signal worth knowing before you buy: the system rates 3.0 stars across more than 21,000 Amazon reviews, while the seed-only refill for people who already own the applicator rates 4.2 — the gap points at the applicator rather than the seed.