In the spring of this year I planted a Princess Flower tree (approx 4 ft) in my flower bed. I live in Nashville, TN and am unclear what I should do to make sure the tree is around next spring. Any information is appreciated.
If by Princess Flower tree you mean Tibouchina urvilleana I am afraid you will have to dig it up and bring it indoors for the winter. Here is a US Forest Service Fact Sheet (PDF) for Tibouchina urvilleana.