I hate to tell you this, but Flora Bloom is not a stand alone nutrient either. Even though you are in flower, you need the Flora Micro and a bit of the Flora Grow. I also found that when I used the Flora series, I needed to add Cal-Mag in flowering. Avoiding the Big Bloom is not playing it safe. read the instructions and use it as directed. I would recommend that you pay close attention and read the full description of the products you are contemplating buying. You are going to need the Flora Micro or you will have problems. You can get away without the Flora Grow in flowering (check out the Lucas formula), but not the Micro (and probably not Cal-Mag).