Set the course for a high-performance, professional-grade lawn with Pennington Contractors Mix, so you can rest easy knowing the seed mix you buy. Once germinated, the grass will grow thick and full. While most grass seed companies buy their seed on the open market, we are the only major grass seed company that works directly with a network of dedicated growers. Built on decades of trust and integrity, our relationships with seed growers and their families now span multiple generations. At Pennington, we know our seed and the farmers who grow it. From field to final product, that's the Pennington way.