Plastic is better than clay for plumerias. Their roots tend to grow into the sides of clay pots, I've read. Nursery pots are ideal because they have a lot of holes in the bottom. If the plastic pot you have has plenty of holes for drainage it will be fine. You can also add holes if there is only one in the center.
I like to read the growing instructions on all the plumeria society sites as well as some of the plumeria retail sites. In addition, there is a Facebook group called Plumeria Growers that has good information.
The Plumeria Society prefers the multiple sized, rigid, black, common plastic nursery containers with at least four water drainage holes towards the bottom to allow for excellent soil drainage. Salt buildup is minimized with plastic and the multiple drainage holes are much less likely to develop drainage problem than pots with a single hole in the bottom center. With clay, single hole pots, the tap root can fill the hole and limit water drainage. This can be a problem for long periods of time as it impairs water drainage and can promote root rot. Feel free to use other materials such as ceramic or plastic with one hole as long as you devote some time throughout the year to verify that there is no salt build up and that the water drainage holes are working correctly and are not getting clogged up.
What is the crested or crown looking growth on a plumaria called?
It's called fasciation or cresting of stems. Here is a photo similar to yours:
https://gms.ctahr.hawaii.edu/diseasespests.aspx?moid=55448
https://www.gardeningknowhow.com/plant-problems/environmental/fasciation-in-flowers.htm
pearing on the stems. What do you suggest? I have tried spraying with a mild soap solution, removed leaves weakened with black tips. Next I will try scrubbing the stems with Q tips and soap solution. Am I on the correct course of action?
I would continue to cut off the affected leaves. The soap solution would be effective if it is pest related. Is it time to move it outside? Hot weather may clear up the problem. Do you belong to FB? The Plumaria Growers FB group is full of experienced growers who will share their knowledge in this kind of thing. I just started growing plumarias and I have used them as a resource. The plumeria societies have troubleshooting pages on their websites, too.
These pages may help:
https://theplumeriasociety.org/plumeria-care/#pests
https://www.gardeningknowhow.com/ornamental/flowers/plumeria/pest-control-for-plumerias.htm
I live in San Antonio, TX. It gets pretty hot here in the summertime so I'm wondering if mulching them is ok
The mulch would actually keep the roots cooler. The sun bakes the dirt if it is not mulched. Mulching also helps prevent temperature fluctuations, and as it decomposes, it nourishes the soil. It also can help retain moisture, so in the case of plumerias, make sure your soil is well draining.
I have recently brought my Plumeria plant back outside for summer, there has been dirt coming out of the holes of the bottom of the pot that my plumeria is planted in, i noticed today that there are several ants or ant like bugs all over the soil that is coming out of the drain holes, plus i seen ants coming from the drain holes as well, there has not been any ants on the top of the soil or on the plant itself. How do i get rid of these ants? Thanks-Sherri Hooper
This article should help:
https://www.gardeningknowhow.com/plant-problems/pests/insects/ants-in-flower-pots.htm
New to Plumerias. I got this cutting from someone and was wondering if it looks healthy and if it\'s finally growing leaves? It is in a nursery pot and I used a rooting hormone with perlite and soil. I originally planted it in Florida but had to come to Utah for a while.
Unfortunately, your photos did not come through. I am unable to see the plant in question. In the meantime, these articles will help you with the plant's care:
https://www.gardeningknowhow.com/ornamental/flowers/plumeria
I don’t know what happened here. They were doing so great and then almost overnight they started dying. I was so proud of myself and then and now I’m so heartbroken ? ?
Looks like the damage some beetles do to leaf tissue or that the eggs which they leave in the leaves and then the larvae consumes the leaf tissue. You need to catch the culprit to apply appropriate counter measures. Some may only neeble at night.