Right combination of NPK
I have been growing lettuce indoors and has had some success, but not complete success. What is the correct combination of NPK for growing vibrant lettuce? I am reading different things on the web and not quite sure at this point. My lettuces is not growing full and tend to be limpy. I'm using Nutri-plus grow A and B and also DN separately. Am I using the wrong nutrients?
My solution is well aerated and I check my pH, temp, and TDS often and lighting I believe is sufficient.