KALIX Kelp is a soluble extract from seaweed (Acophyllum Nodosum), and is a beneficial addition to all feeding schedules (see feed charts). Seaweed extracts have shown to stimulate root development and plant growth. KALIX Kelp is ideal for adding to nutrient solutions and foliar sprays. (It is NOT recommended to foliar spray Kelp during bloom/flowering stages.) Works in conjunction with all nutrient and feeding programs.