Originally Posted by BonsaiOrlando

I own a very old Trident maple. I have attached a pic that is about two months old and you can see browning of the leaf edge. At this point it is not bad and quite normal. Now I think I have a serious problem developing. It has dropped 2/3 of its leaves and they turn dark grey/brown and drop. It starts from the edge of the leaf and works its way inward torward the branch. At first I thought maybe too much sun as Im in florida zone 9. Its been in shade wth light on the patio for over a month and getting worse. I superthrive every three and a half weeks or so and rotate that and fish emulsion. I water daily but not a long soak just a a shower and drain. I recently applied 3 applications of insecticide soap, your typical blue spray bottle and any chaon store. Its called garden something rather. I also repotted this past weekend because I had a lot of really thick moss from colorado but it turn dark and smelled like hell. It in fresh pine bark,turface mixture and drains nice. I also put a handful of vigro slow release. any suggestions?