That soil is pretty hot with nutes anyway, what happens is that if the store you got it may not have been storing the soil in a dry area so it got wet and once it gets wet it starts to dissolve the nutes in it. I contacted them via email and said I was having huge difficulties and they sent me a check for the bags I bought, and not that I did this maybe they saw a flaw but they changed thier bags to be water or wheather proof, so since then I haven't had a problem with it at all. So thats how I got my nute burn and I believe thats what I'm looking at here, The fact of the matter is you were feeding it nutes too, so that means nute burns. But I do see they are the bigger ones, some say don't prune they protect the flowers but I would go ahead pluck those ones that are for sure gonna die and stop feeding it