Hi, just hoping someone could please tell me what is happening to my potted Imperial Mandarin Tree. It has dropped most of its leaves, and has brown dying or dead wood tips. I can see new growth and flowers, but worry it will lose its fruits again like last year or not produce any at all. I have just fertilized with Citrus Food and Dynamic Lifter. Last year it was full of fruit, but then dropped them all but 2 or three when they were about pea size. Thanks for any advice, it's much appreciated 
