I'm in agreement with the previous post. Were I to find someone helping themself to my plumeria, I might be inclined to take my shears to them and do a little pruning, too.....
It only takes a minute to ask for a cutting.
That said, back to the post.
What did you use for your potting mix, Marmalve12, on those gorgeous plumeria from Mike? They look very happy and healthy, and all neatly potted up.