Q.My Newly Planted Chinese Perfume Tree Is Dropping Yellow Leaves Is That Okay?
It is planted outside in what should be the ideal location.
Certified GKH Gardening Expert
It would seem that you are just outside of their hardiness zone. They will only thrive in zones 10 and 11, but yours is zone 9.
Unfortunately, your photo did not come through. I am unable to see the damage to the tree.
I can take a guess at what is happening, though. It is likely transplant shock. If the temperatures start dropping, this tree can experience leaf drop, as well.
Your best bet will be to grow this in container, and put the tree indoors in bright light during the Winter.
This article will help you to know what care they require: