A prevegetated blanket protects an exposed soil surface from erosion in an efficient manner. The prevegetated blanket has a fibrous structure, with a water retaining composition, water retention substance and topsoil to receive the desired seeds. Components of the prevegetated blanket of this invention grow a living membrane for native and cover crops in a controlled environment in a weed free, state. Then, the prevegetated blanket is transferred to a specific site and installed immediately after soil is prepared.