Same thing is happening to me. Ue a 1000HPS for flower and I cant even get an oz from a 3 ft plant. I get probly a quarter. Thats of course after all the small buds and trim go into the hash pile. I have no clue whats going on. My soil is at the proper ph. But my plants in flower turn yellow about 3 weeks into bloom then all the leaves drop within 2 weeks. This is happening to every plant I put in there. So ive started mixing half bloom 2-6-6 and half grow 6-3-4 because people were saying N deficiency. I'll see if that works in the next 2 weeks. Everything Ive tried so far hasn't seemed to do anything. Changed soil mixtures, different organic formulas, strains,even bought a new tent and nothing.