Maxicrop Soluble Seaweed Powder 0-0-17 - 10.7oz - OMRI Listed® Maxicrop Soluble Seaweed Powder is a great choice for those who want to feed their plants naturally occurring minerals, vitamins, and enzymes. Maxicrop Soluble Seaweed Powder is extracted from Norwegian Ascophyllum nodosum seaweed. Maxicrop Soluble Seaweed Powder has a guaranteed analysis of 0-0-17 and is listed by the Organic Materials Review Institute (OMRI) for use in organic certified production. Great for use on flowers, shrubs, trees, berries, vegetables, fruit, root crops, etc.