Leaf problem

I have four plumerias - two large plants and two that are small, rooted cuttings. The large ones and one of the cuttings are doing well. But one of the cuttings has been slow to grow and has some discolored/deformed leaves. I am tempted to trash this plant in case it has some disease that might infect the others. Attached is an image of three of the leaves. Top two pictures show a couple of the deformed leaves and the bottom shows a normal leaf. I have not sprayed this plant with anything nor has it been exposed to extreme conditions. Does anyone know if this leaf problem is temporary (maybe caused by insects or mites or the weather or a nutrient problem) or does it look serious? If there is any doubt I'm getting rid of it.

Tom, plumeria leaves generally look terrible this time of year. This is completely normal and not a sign of a virus and/or a disease. We are going to be seeing a lot of these questions very soon! Yes, the dramatic weather changes between daytime and night time temps, the decreasing hours of daylight, and the lower nighttime temps are going to make the leaves look terrible until they drop. They may even get rust before they do. They will drop as they prepare to go dormant. The plants will go dormant when the temps drop below 40. You'll need to put them in a dry, cool environment with good air circulation to protect them from freezing temps and to protect them in their dormant state. If you want to keep them growing and keep them from going dormant, you can put them in a nice warm greenhouse where they have lots of light and heat. I just got an email from Kell this morning about the exact same thing:-)

I forgot to add that some cultivars are more cold sensitive than others, and more mature plants are more cold hardy than less mature ones, which explains why your others don't have similar leaves right now, but they will soon if subjected to enough cold temps.

Okay, one more thing that I forgot:-) Sucking insects such as whiteflies, aphids, spider mites, and broad mites can also make the leaves deformed so you may want to check for those too, but soon the leaves will drop anyway so treating those is unnecessary unless you are going to move your plumerias into a greenhouse. If you are going to move them to a greenhouse, I would highly recommend removing some of the lower leaves and spraying the upper leaves with Schultz's 3 in 1, which is a miticide, a fungicide, and a insecticide before you move them. This will help greatly with rust and insects while in the greenhouse.

Thanks, Clare! I guess this is caused by cool, damp weather and the plant should be OK next year. I am planning on keeping the plumerias in the garage, dry and dormant, so there should not be any leaves to worry about over the winter.

Irregular watering also does this.
If that wasnt mentioned. ;)

Sudie Goodman, Zone 8b, southeast Texas
Clare, thanks for good information. I had same leaf problem and used Schultz 3 in 1 which corrected it.

My plumeria is potted, about 18" tall, survived Rita's savage winds. It was on my deck where roof was blown away and then an 18" diameter pine tree fell onto my deck but missed my plumeria.

My dear friend brought this plant back from her Hawaiian vacation trip. I will overwinter it in my house so that I can keep a close eye on its progress.