Wilmer Worm’s Premium COCO COIR 42mm Seed Starter Pellets (36 Count). Wilmer Worm’s grow pellets are dried and compressed in a secure fine mesh netting. Pellets are universal and fit all grow pellet greenhouse kits. Used in gardening, starting all plant and flower seedlings. They have a higher resistance to mold and mildew than peat pellets and they're thickly bound with their own natural fibers which makes them sturdy. The best part is that you can plant them directly into a planter, garden or potting soil. There is no need to remove the plant which means you avoid transplant shock. Just place in water for 5 to 10 minutes and they expand into a self-contained soil net ready to grow. After your seedlings sprout, drop the netted container directly into the ground or planter pot. No mess, no fuss. This is the best and easiest way to start plants.