Hmm. Alright. Thanks for the suggestion, Hetty. Sounds like I'll probably have to cut this one back, then.
Ken, in glad(?) To here I've got a stumper for you.
We got these plumeria from someone who was selling an impressive selection at a farmer's market... They certainly have grown a bit, but nothing like the 2-4x that you say yours get. It's possible that we're not caring for them properly.
I think we had one morning with light frost this year, but I believe we'd already moved the plants into the garage by then. If not then I suppose this could be freeze damage. And yeah...it's hard to overwater most plants here in southern California.
I'll keep everyone posted on what happens.