Sandy Loam is a type of soil used for gardening. This soil type is normally made up of sand along with varying amounts of silt and clay. Mainly used as a subsoil for under new turf areas. The composition makes it an ideal soil type for many plant types because of the balance it gives. The Sand gives the soil better drainage capability, something that clay is not very good at and it promotes good root penetration which results in a better and stronger lawn.