Hydroseeding a 1:2 Slope: SAP Rate, Mulch Ratio and the First Rain
2-3 kg of SAP per 4,000 L tank, 5-7% of mulch weight, tackifier last. Without a tackifier a 1:2 slope sheds the whole mat in a 40-minute rain.
Hydrogel for Roadside Revegetation: What Actually Holds a 1:2 Cut Slope
In March 2024 a county roads crew outside Coimbra hydroseeded 1,200 metres of a 1:2 cut slope above a two-lane road. The mix carried 380 kg of wood mulch, 45 kg of a native seed blend and, after a long argument in the site cabin, 14 kg of water retaining gel. By June the slope was green in bands and…
