Something happened to my 50 year old gardenia bush last fall or winter.
I am not sure what variety I have. I can provide pictures if helpful.

During that time, the plant dropped most of the large green leaves. Now,
the remaining long branches only have very small leaves and stunted
blossoms. The usual spring growth of large new leaves and new blossoms
just won't start.

What can I do to revive my gardenia? Feeding it with Gardenia, Azalea
Camellia food twice has not caused increased large leave growth or new
blossoms. Should I prune back the long branches?

Thank you for any suggestions. Dave_s