Thanks again for the advice. Unfortunately I appear to have cooked it. I recut it and this time placed the cup it was in on a hot plate. The temperature probe read 35C which would be in the 90sF but something must have gone wrong. The leaves were falling off this morning and the stem was soft.
Par-cooked plumeria anyone. Guess we'll have to go back to Hawaii on another honeymoon to grab some more.