Humboldts Secret Flower Stacker is a flowering formula designed to decrease the distance between branching. Each ml will raise ppm’s by 20. Start by using 1ml per gallon after week 3 in flower. Increase throughout the flowering period to a maximum of 8ml per gallon if no nutrient burn occurs. Be careful.
Although you may consider Golden Tree as an all-in-one additive, many people like to use additional flowering boosting formulas. It is your preference as a grower whether or not to use Flower Stacker.