SUPERthrive Vitamin Solution is not a fertilizer, its a vitamin-based formula. Just as the human body needs a full range of nutrients and will suffer from an inferior diet, plants need more to thrive that the nitrogen, potassium & potash found in most fertilizer products. Dr Thomson's proprietary plant health-promoting Vitamin formula contains Kelp and vitamin B, producing larger blooms, greater growth and better results. just a few drops per gallon of water will be sufficient to see excellent results.