Hi! So happy I found this Cubit :))

I have 3 Plumeria, 2 from seeds and one from a cutting. They're all 4 years old now. When do they bloom?
The first 3 years I let them go dormant for the winter due to space issues. This winter I found them a home and they are growing happily...I replaced the fluorescent light in my bathroom with a grow light
They've all got multiple branches...yet I've never seen a bloom...is there anything I need to be doing to encourage blooming?

Give them as much warmth and sunshine as possible.
The cutting can bloom anytime, the seedlings will likely take 3-4 years.