Nothing special MM. Really,cut as far back as you want..it will resprout. I would wait until early summer when you can do that for its summer vacation.

Now,if its grown indoors all year? Congratulations!..fantastic to also get to flower. Also,if you do keep it indoors all year,then yes,I guess you could prune it now. All the cuttings will root also. Let them dry a week or two..then pot up in a fast draining mix.

Thank you very much, Stan. It's not indoors all year. We bring it out on our deck in the summer and give it lots of Miracle Grow. My son gave this to me as a gift from the Philadelphia Flower show six years ago and it was just one little stick. I am quite sentimental about plants.

Can you recommend any specific type of "paint" I should use on the cut branches? I've read it should be used but I don't know the actual name of the product.

Thanks again!

Prune it before summer. take the current branches and cut them back 1 1/2 feet or to where you want. That container looks a little small. I pruned mine in Nov. It's just starting to show new branches.

I used a small container purposely so that it wouldn't grow out of control. It seems happy and healthy. Do you think it needs a bigger pot? Any advice on what to "paint" onto the cut branches? Thanks again!

you can prune it every few years.. yes it all looks very healthy and I see it's been flowering for you! It has reached the tree stage so it wouldn't hurt to give it a few extra inches this year. not right away.

There's no need to 'paint' cut branches. They exude a white sap which dries and protects the cut. They can flower at very small sizes so you can cut it back to virtually whatever size and shape that suits your needs and fits better into the space you have.

I got a short video on how I solve this: http://blog.tropicsathome.com/video-update-growing-plumeria-frangipani-indoors/

Thanks everyone for your advice! I cut my plumeria back today and now I have all the cuttings. Can someone please let me know if the cutting in this picture can be planted as it is or if it needs to be cut into three separate cuttings? Thanks again!

No need to cut it. This is called an "instant tree" haha

you can plant that as is or make three separate cutting plus the bottom that will sprout three more.

Let the cuts dry out/heal a bit. I've had cuttings sitting in shade for a few months and still sprout. A few days to heal will protect against fungus getting in when in damp soil.

Wow! You have a plumeria TREE,not just cuttings, with leaves, in Jan. in New Jersery! And it blooms?! That is a big accomplishment!!! my outside plumerias in south Fla. are totally bald in Jan. and bloom in the spring, THEN get leaves after. Then drop all the leaves again in Sept/Oct. And go dormant. You already have your answer as to how to cut it back. It is as easy as cutting back to a 'crotch' Or where a stem is coming out from a bigger stem. You dont want to leave a 'stump'. It makes the tree look messy. By now that 3 armed cutting you have must be a nice new tree! Wow!!

Thanks PoohBear and Stanofh. I don't come onto this forum a lot so I just saw your posts! Sadly my original Plumeria Tree pictured here died this past fall. I think we cut it back too much in October. But I have a lot of new cuttings that are doing very well. The cuttings I posted above from 2017 were all given away. Some of my friends are having success; some are not. But look what I have now from cuttings I took in October. This is becoming an obsession!