Nature’s Seed uses an extensive network of grass seed producers from around the country, but the majority of the cool-season grass seeds we use were grown and harvested in the Pacific Northwest. Oregon is the largest supplier of cool-season grass seeds in the country and is grown and harvested by professional farmers. Here at Nature’s Seed, we select and stock only the best grass varieties based on data gathered by the National Turfgrass Evaluation Program (NTEP).