Yes, buy more plants = increases your odds of more flowers. Like other plumeria junkies, we all started with one plant....the rest is history.

Once a plumeria flowers it "should" branch (2 tips, 3 tips, ??) and branching results in more flowering and the cycle continues. Some may bloom annually, some may take a year off from blooming. Many of my late season flowers stems from last year rebloomed this year because we had a very nice warm summer here in Ventura, California. In fact, i had one pink plumeria with 5 tips that had 9 bloom spikes (some from 2011, others from 2012).

Cheers, Mike

Mike- you got me laughing out loud. Just like suggesting an alcoholic have a few more drinks. Another answer is to select varieties that are heavy bloomers, which are, for me, Thornton Lemon Drop, Guillot's Sunset, Kimi Moragne, Psycho, Celadine, Ruffles and Samoan Fluff. I see the larger production after 5 years.
G-sunset

OH MY GOODNESS! That is the most amazing, huge inflo cluster I have ever seen!

What if we behead young plant to induce branching?
More branches means more flower spikes
Ofcourse this had to be done just at start of growing season when growth is fastest

Ditto what E said, Bill! Wow! I'm thrilled to say my Guillot's Sunset finally rooted after a nail-biting summer--yay!--then promptly went to sleep, lol.

Trip, that would definitely work, though you lose bloom potential for that season and possibly the next as those new branches mature to blooming age. Still, I occasionally see someone post that a new tip from a pruned branch blooms late the same season it's grown in. Worth a try.

"WOW" Bill
Gorgeous - Keep them coming
We need some beauties to keep us going
Peg