RAW B-Vitamin contains 1% vitamin B1 which is the highest concentration of water Soluble vitamin B1 available to the home gardener. RAW B-vitamin also contains 9% magnesium and is an optimal magnesium supplement. RAW B-Vitamin is most beneficial during transplant, times of stress and during heavy fruit and flower production. Raw B-Vitamin can be used at all times of growth and bloom and is a beneficial supplement to all feeding schedules. Works in conjunction with all nutrient and feeding programs.