I have two of these puppies in containers on a top SW-facing covered patio garden. A row of low shrubs in front provide good protection from direct sun damage. One is planted in a large (2.5' diameter) ceramic pot for maximum growth, the other restricted to a 1' bonsai pot for training. They are healthy. I am in the far N. Dallas/Plano, Tx area - zone 8a. Suggestions please on how to overwinter them. Many years ago I wintered one inside and it never had great growth spurts.