SupreKelp (0-0-1) Natural Plant Superfood SupreKelp is a vegetative kelp extract formulated for vigorous plant and root growth. Our proprietary formulation mechanically extracts key compounds within the various forms of kelp responsible for improving plant growth. This extraction process stays away from harsh chemical extraction methods that degrade sensitive compounds found within seaweed. Use SupreKelp once a week from seedling or cutting throughout the vegetative growth phase for vigorous growing plants.