Dutch Master MaxFX Flower MAX-FX is a unique foliar spray that delivers amino acids and complex carbohydrates inside plants. Amino acids and complex carbohydrates help plants grow big and strong, but can't be taken up by their roots! Dutch Master's extensive lab testing at the University of British Columbia has proven that the only way to get amino acids and complex carbohydrates inside plants is through the leaves-with MAX-FX and Penetrator! Available in Grow and Flower formulas.