Contractor's Mix contains annual ryegrass so it germinates quickly and provides a fast grass cover. It is most often used by new home builders to establish a lawn quickly because it provides excellent value for the price. Contractor's Grass Seed Mixture can be overseeded with any Black Beauty Grass Seed Mixture to grow a lawn that will persist for years to come. This Jonathan Green grass seed is perfect for your lawn care needs! It is an annual ryegrass that can be grown in full sun or medium shade.