Avena sativa. The fast growth of this soil builder makes Oats cover crop seeds ideal for sowing in the spring for erosion control or quick tilling. Planted in August, oats will put on a lot of growth and, in most winters, will be killed by frost. The dead plants will protect your soil for the winter. Oats add a lot of carbon and organic matter to soil and are not hard to till under. Oats can also be grown for use as cat grass and for providing healthy greens to other pets. Use 50kg (110 lbs) per acre. 500g covers 438 ft.