Certified GKH Gardening Expert
Plumeria will bloom whether or not pollinated. You only need the flowers to be pollinated if you want seeds, but most cultivars won't produce seeds anyway. Plumeria contains both male and female parts on the plant, so yes, it can self pollinate, but there is no guarantee. It more often is pollinated by insects. You also can pollinate the plants yourself.
Here is more information: