My Frangipanis - all 4 of them including one Plumeria obtusa - have not set any flowers again this year! It must be something I did because I had the same problem last year, whereas they all flowered fine in '08 and '07.
What could be the problem?! I have not pruned them in the past two years, so it's not that. I did re-pot them though.
What helps Frangipanis to flower well?