PureLife Earthworm Castings - 26 lb bagWorm Castings are an all natural way to boost soil health, while adding essential minerals in a bio available form making plants thrive. Use 10 30% worm castings mixed into soil when starting seeds, transplanting, or top dressing. All purpose, organic, no risk of burning plants. Good for use on veggie gardens, perennials, fruit trees, potted plants, and seedlings. OMRI Listed, certified organic.