I just recently purchased an Australian finger lime plant and wondering what the best fertilizer to use for it is. It's a dwarf variety and I have it in a pretty large pot. The nursery recommends a slow release fert for it but I'm not sure if i'm a big fan of slow release ferts. it's too difficult to determine when the fert is depleted and i'd rather not wait til the plant shows signs of deficiency before feeding. What is everyone feeding their citrus? thanks!