An extremely comprehensive formulation, the Mills Nutrients C4 is an excellent blend of multiple micro and macro nutrients including organic seaweed extract, carbohydrates, minerals, cell building amino acids, auxins, cytokinins, fulvates and humates. It allows plants to flower to the best of their ability, and creates large blooms which in turn lead to yields which are not only denser and stronger in taste, but heavier and faster growing too. The special formula gives plants the ability to benefit from enhanced glucose production as well as essential oils, both of which have positive, noticeable effects on your final crop. Comes in 2 sizes. Does not have any synthetic PGRs.