Curious Gardenia graft

Q: I was told to send you pictures of my hybrid gardenia tree. About 6 months ago the new growth on the top of one side became crinkled. It doesn't get straightened out either. It seems like it just stays like that until it falls off. Any ideas?

A: Your plant is not sick at all. This is what happened...
Your gardenia is a grafted variety. Gardenia varieties (Gardenia jasminoides hybrids) are grafted on rootstock of Gardenia thunbergia (this species is nematode-resistant and used for rootstock especially in Florida). The side branch that you call "crinkled" is actually the rootstock (Gardenia thunbergia) growing from UNDER the graft. Gardenia thunbergia has naturally "wavy" leaves.
If you follow this branch to its base, you will see where it starts - right below the graft. This happens very often.
You need to remove this branch altogether, from the point where it starts. It sucks energy from the plant and eventually may take over the whole plant.

Photo above: Gardenia thunbergia with curly leaves