Grotrax Seed - Every Seed Perfectly Placed at 120% of its recommended planting rate. Each Grotrax roll contains the latest technology, high-quality seed from leading Oregon growers. Grotrax Micro Pellet Fertilizer produces fast germination and uniform growth. Our proprietary blend contains immediate use Nitrogen, Phosphorus, Potassium, plus a patented polymer-coated 120 day, Nitrogen time release fertilizer. Grotrax Biodegradable Fabric - patent-pending and supesorbent. Once rolled out and watered, it sticks to the ground. Each seed is then surrounded by fertilizer and held in place between two bio fabric layers, holding 6 times their weight in water. Simply roll, water and watch it grow.