Jonathan Green, Contractor's Mix 25 lbJonathan Green Contractors Grass Seed Mixture is the ideal grass seed for soil stabilization or temporary lawn seeding. Contractors Grass Seed Mixture 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 an excellent value for the price. Contractors mix grass seed can be overseeded with any Black Beauty grass seed to grow a lawn