RAW B-Vitamin, by NPK Industries, is a technical grade plant supplement that is used for horticultural purposes. Containing 1% Vitamin B1, this product has the highest concentration of fully water soluble vitamin B1 available to the home gardener. Product also contains 9% magnesium. Compatible with all nutrient/fertilizer programs and can be used at all stages of growth and flowering but is perfect for heavy stress times such as transplanting and bloom time or in drought conditions. RAW nutrients are water soluble, ideal for “spoon feeding” plants exactly what they need as their needs change throughout development, allowing for complete control of their needs.