Once my plants were loaded with flowers I stopped using 'grow' but continued to use micro and bloom. I haven't used any 'grow' for about three months now. I don't use GH and don't really know their proper ratios. With the stuff I use it's 60ml micro and 100ml bloom per 5gal of water. I also use 'amino' and 'calmag' and an additional bloom enhancer, although i'm sure those three are just a waste of my money, lol. well maybe not the calmag.