Just bought a house and our real estate agent gave us a fruit salad tree that he bought 2 months ago. I have a care pamphlet from the Australian growers of fruit salad trees, so I read it and pruned vigorously, trying to section off each type of fruit to its own quadrant on the tree. I don't know what fruits are on it, but I see new fruit shaped like oranges and limes. What might be causing the yellowing? I've NOT fertilized yet, don't know when or with what I should do that. I want to get it healthy before I actually plant it in the ground. Any advice would be great!