General Hydroponics BioWeed® is derived from a blend of cold processed seaweeds that act as a plant and soil vitality enhancer. Seaweeds have long been recognized as stress reducing agents and powerful plant boosters. BioWeed encourages prolific root and foliage growth as well as larger flowers and fruits. BioWeed works synergistically with all fertilizers to promote vigorous, healthy growth. Use with any garden soil, potting mix, or other growing media.