This question concerns an ornamental cherry tree, an Okame, that is not yet flowering or leafing out. I live in Havertown, PA, and the other Okames on the street have already flowered and are now leafing out, but not mine (which is approximately 11 years old). The buds have remained small and a few show a hint of pink, but not many. Last year, after it flowered, I noticed that although it leafed out fully, the leaves were not as big as usual and they dropped off the tree earlier than usual, though still in the fall. Any thoughts on what is ailing the tree and what recourse there might be? Is it safe to plant another Okame nearby? If not, what is the waiting period? Is there somewhere that I can take a cutting from the tree for diagnosis? Please advise. Many thanks.