Perhaps a 20 yr. old plumeria is equivalent to a 75 year old person. You know gravity and all.
I don't have a clue, Patty.
None of my plants have ever done that and I have some that are over 20 yrs. old. Of course, my plants aren't as tall as a house, with 10' branches carrying loads of huge leaves. It is hard for me to imagine, in Fl, with its sandy soil, being able to water too much. I have to water my plumeria practically every day and I can guarantee you, I could water them twice as much and twice as often, and they would love it. I can actually tell when my blooming plants are asking for water. This time of year, they are often asking.