Thank you again! I will definitely keep your advice in mind. Since now I know what my plant is, I learned what kinds of plant food it likes, which was totally different from what I have in hand! First of all, I didn’t know my plant can bloom pretty flowers! : )

You’re welcome! From what I have learned, besides hating wet feet, Plumeria is not a fan of cold rain either. Best wishes.

I mean, I “mean” it!

Thank you so much for your helpful advice! I meat it!!

Oops! It should be :’ lack of sunlight’ not ‘like of sun’ 🙁

This looks like a type of Plumeria, maybe Singapore Plumeria (Plumeria obtusa). you can grow plumeria out door during the summer months. You also need to elevate your pot up from the saucer. Out door you can remove the saucer when the pot is put outside. I am not able to find any information for the exact cause for the leave stems. But you should remove the infected leaves. I am guessing maybe it is suffering some kind of over winter stressing like: like of sun, too much water and low temperature.(I would slowly decreasing the amount of water, and stop watering all together of my potted plumeria during the winter months for its dormancy) You can get in touch with the Plumeria Society for further assistance.