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.