don't know but it has happened to me during heavy rainy season. may have something to do with that

Thanks. I don't really think it's that as we haven't had much rain in recent months. I'm very disappointed as I have more flower buds this year than ever before.

extreme hot and insufficient water might also make it happen. It is frustrating to receive an either / or answer but it is like w/ humans, too much food or not enough is detrimental. Its likely temporary.