35% Kentucky Bluegrass 35% Creeping Red Fescue 30% Slider LS. Perennial Ryegrass Premium Plus LS. lawn mixture is suited for any soil type with Lateral SpreadTM Perennial Ryegrass. Lateral Spread lawn mixtures have a spreading tiller which fills in bare spots fast for increasing density to prevent possible weed pressures. Our lawn mixtures are created with dark green and fine-leaf seed varieties, making your lawn stand out from the rest. Each mixture has been custom designed and tested for Canadian summers. General Seed Company is the only retailer in Eastern Canada that carries Lateral Spread technology seeds, used in premium custom mixtures and designed to suit your needs.