Hibiscus buds falling off
I have a large and well developed interior hibiscus, approx.7ft. tall. For years it did not produce any buds. Now I have given it fertilizer treatments and it is full of buds which continue to mature until the flower can just be seen within the bud and then the bud drops off. Any ideas as to why this happens and how it can be corrected?
I have another smaller hibiscus which does not bud at all. Suggestions would be appreciated.
Thank you, Douglas