Have all of your grows been in soil less? Soil you don't need a whole lot of nutes, soil less is a bit of a different story. I'm quite fond of cutting edge solutions 3 part. It's cheap, no crazy pH or ec calculations, just drop it in and you know it's good. I add some Calimagic, heavy 16 roots, and some m.p.k. as a flower booster. I never run into problems. Eventually you'll find something that works, when you do, stick to it. Modify every now and again to tweak and see if it's better. But find something that works for you, your media, and lady's .