Neptunes Harvest Liquid Fish & Seaweed Fertilizer (2-3-1) - Made from hydrolyzed fish fertilizer from fresh fish remains from the North Atlantic Ocean. It also contains seaweed (Ascophyllum Nodosum). Can be used as a foliar spray, in drip line irrigation systems or watered directly onto plants. The product has been screened down to 150 microns so it will not clog your drip line system. It is recommended to flush the system with fresh water after fertilizing.