Before you start overseeding your pasture, make sure it is free of weeds. Start controlling weeds by removing them with a harrow or a suitable herbicide.
A pasture that is to be overseeded must first be mown or grazed short. The next step is to loosen the topsoil with a rake to ensure good contact between the seed and the soil. Try to sow the seed before a forecast rain shower. Distribute the seed evenly across the land and then compact the soil by walking across it or rolling it. If your pasture is too large to be overseeded by hand, contact an agricultural contractor with a special overseeding machine.
After the overseeding the soil must be kept moist. Do not manure your pasture for the first eight weeks after overseeding. The existing sward may be mown as soon as the young grass plants are sufficiently developed (>6 cm). Light grazing is no problem, providing you make sure the horses do not graze the grass too short.