We have a 4 year old cherry tree, and the only thing that ever happens with it, is we get green seeds, but they never do anything. There is a 2 year old tree next to it that is starting to get ripe cherries on it now. What is wrong with the older tree? There is tons of fruit on it, but it has never done anything since we got it. Is it a bad tree? It blooms and everything. -Mark