My lemon trees have been having nothing but problems lately, and I'm worried! I was told by someone at a nursery that they needed to be fertilized. But then they started to show signs of over fertilization so I stopped fertilizing about 3 weeks ago, and I thought there were some improvements but now they are looking worse again! in the process of this they were also eaten by something... I've used diameceous earth around them to try to help with the bug problem, and I don't see any new damage.