Thanks you two! The pot is too small for the root system of this plant ... roots have been growing out the drainage holes for the past couple of years so it's probably way past time to get it out of that container! I still haven't decided if I want to find it a permanent place in ground or keep it as a container plant but it will probably be the latter so that if we do have extended cold during the winter I can move it into the house or garage. I've seen a very large Plumeria tree in a yard here in town, on the south side of the house and it's been there for quite a few years ... seems to have come through our cold winters just fine but they have a lot of big trees in the yard which probably gives it some protection from frost and they cover the Plumeria with blankets on cold nights.
Hetty: You are correct regarding water issues. It's been very dry here for awhile now ... we finally got a nice rain about a week ago but we've been in extreme drought conditions and I was not watering anything regularly. The sprinkler timers are now fixed so they get water twice a week when the lawn is irrigated ... maybe I will see a change and signs of leaf growth soon! I think next week I will try to find a larger container and mix up some fresh potting medium and re-pot it. I will keep you posted!
Thanks again for the tips!!