I'm curious what your plumerias look like in winter Ken. Do you have pics of how they look like before the haircut and after?
I usually does a haircut of mine when the wheat her mine starts mentioning frost, which is late Dec, late Jan or like last year, early Feb. My Momma plants will usually branch out 3 to 4 where I cut it and will usually bloom same season, except this season no blooms on my new branches.