Hey! My bird plum isn't feeling the best. Its leaves are curled up, dry and have a yellow tint to them. Some leaves also have brown specs, some are just absolutely pale. What is this caused by? I'm not an expert, but the root look healthy too. Is it a lack of fertilizer? I didn't fertilize it yet, because I want able to find anything locally, fertilizers that I have found on the interwebs wouldn't deliver to my country. Any help is appreciated.