I like the title of your post. As you are trying plumeria, you will find plumeria very trying in Maine. I have gone through a half dozen cuttings of plumeria trying to find just what conditions are well suited to its cultivation. The one I have now is dormant and I am trying not to water it enough to cause it to rot, yet enough to have moisture available for its sprouting again. I wish you the patience to find the right place to grow it and succeed. Al

You might want to check out the Plumeria forum. There's lot of info over there.