Are they new plants? How old are they? What kind of soil/or combination are you using?.... I'm a soil grower, use my own soil mix recipe, and I Use Blue Mountain Organics(ebay only) Very cheap, simple bottle, simple label, and unbelievable prices!!!! They are great to speak with about any questions, and make fresh batches monthly. I have already had a massive crop using strictly BMO. My yields were great, no bug probs, and I saved at least $150.00 on more brand name , pretty label ferts. There are post on here about BMO, some by me promoting them. I just know that so many of us on here cant afford to grow everything with Advanced or Foxfarm, and after visiting their ebay store and saw what goes into their product, I knew i had to give a go. And I will never use anything else again!!! 10 year grower and counting..... Hollla if you have any questions. Oh yeah, when u do your search on ebay for BMO. Just look up Super Plant tonic and from there you can go to their store. Holla if I can help!!! Peace and God Bless..