Here is my tip for the day , take it as you will, I don't use any store bought foliar spays because I use my own , but foliar feeding is very important, in the week leading up to flip, 1, I pre load with pre flower mixture, its mix of grow and flower formula , 2 very important I give a light feeding of just Ca and kelp maybe 3 days before flip, 3 a light foliar spray of Ca and kelp, maybe 2 days before flip, and a light foliar spray of micro nutrients , I do this at various times in the plants grow but I think this week is most important. why is this important , Ca and B have slow uptake rates and they need each other for uptake, B is the important one its because it aids in fine structure of cell walls, Roots , meristematic tissue , bud sites, the amount of bud sites , and the structure and size/quality of buds, pollen etc, So you can see why B is so important at the time of flip, for bud sites , structure and the stretch of the plant to name a few. the Boron is in the kelp , kelp is rich with mannitol boron is complexed with this and moves freely through the plant, another way to get B is by using Borax but I don't recommend that to anyone until you have a firm grasp on what your doing. forgot to mention B also aids in the uptake of P and K