RAW Kelp is 99% Kelp extract from seaweed (Ascophyllum Nodosum). This product is water Soluble and contains only 1% soluble potash which is a direct reflection of its purity. Kelp extracts are also very rich in natural plant growth hormones. RAW Kelp is a beneficial supplement to all feeding schedules. It is also ideal for adding to foliar sprays and for creating optimal recipe solutions. Works in conjunction with all nutrient and feeding programs. RAW = soluble/Solubility = Availability.