Slope erosion control with the use of fly-ash and sewage sludge. The paper presents alternative methods of the earth slopes reinforcement. The techniques proposed utilise recycled materials such as fly-ash and sewage sludge. It is described how implementation of fly-ash made capping materials and hydroseeding method (with the use of the sewage sludge) can effectively control high earth slopes erosion, based on the example of embankment type landfill where remedial works were proceeded. Moreover, it is assessed how the influence of the vegetation cover on engineered landfills, can significantly increase the safety factor of slopes.