As to my experience in trying to root and watering plumeria cuttings, what I have learned is to water thoroughly only at the initial time it was potted. And in consideration of our very dry and extremely hot temps, I have to put the plant in part shade, since the plant also needs bottom heat. If you put it in direct sun immediately, the tips will just scorch. And like most young plants, once it is baking 95F and higher, it just slows down even more, so have to shelter it in shade. Occasionally I let a slight mist go its way, but never drenching the root base since no leaves, no roots yet. How long do I wait till I can water again, that is the agony, since it takes awhile for those leaves to form, at least in my area, being very, very low humidity levels. Have learned that leaf clawing is not good enough, has to be fully formed leaves before I can water again. And on occasions that blooms came out first, with no leaves, still should not be watered, since there are no roots down there.
Find a spot in your garden, where you can leave it alone while it gets its part sun/part shade after you have first potted it and given its first watering. Sometimes that is the hardest thing to do.. to ignore the plant while it does its thing at its own snail pace
