The thing I noticed with my Plumeria, as with my other tropical plants, they seem to like more water here in my area. I do not know if it will apply to your growing area. I have often read to give intervals in watering for the plumies, but in my very dry,dismal humidity, no rain for about 6 months area that goes into triple digit last summer, it surely appreciated increased watering when the leaves are finally out. And I got my first blooms this late September. I know I gave it some bulb bloom fertilizer at time of planting, and again some bloom booster fertilizer in August..but that's about it. It grew taller, then the blooms came this late September when temps have gone down to the more favorable mid 80's. Location of my plant, it is in a full sun for about 3 hours then just dappled sun in the afternoon, and it is grown in a container too.
But I have to observe again next year if it does the same. I have another plumie that did not grow tall much, but I think I know why, I did not give it a bigger container, so no blooms either. Or maybe there are just some varieties that are a bit more difficult to grow.
