Ecklonia maxima is a specially selected variety of seaweed, harvested from the South Atlantic & Indian oceans, then dried & milled with no added ingredients. It is able to absorb several times its own volume of water, making it invaluable as an ingredient for compost mixes & for use in pots, planters, raised beds & hanging baskets. Saves both time & valuable water resources. It will naturally break down over the season, conditioning the soil with vitamins & minerals & stimulating microbial activity.