W.O.Paradise,
What do the new leaves and branch tips look like? Any chance you can take a picture of the tips and the branches. I think that may help more.

I think once you get your plumeria acclimated to outside light and temperatures, it will grow normally again. You are putting it outside, right?

I have had this plumeria for eight years. The leaves are no longer a brilliant green and healthy looking as they were two months ago. They have rusty brown spots and solid brown areas on the leaves and the leaves are turning yellowish green. The two other plumerias I have on either side are also starting to look the same. They are all in pots on my back porch. I have never had anything like this before. Does anyone know what this is and what I need to do to fix it?

Isn't it sunburn?

Christopher

Thank you Christopher for responding. I have never had a problem before. I am not sure. It could be, we put them on the pool deck why we painted the patio. The other leaves look different. Could it be an over watering issue?A lot of rain blows in on the porch.

Just wondering if the sunlight reflecting on the water intensified
the brightness, the way it is easier to get a sunburn when you are in a pool with the sunlight reflecting on the water...Anyway, sure looks like the sunburn I have seen on some of my plants I hastily put out in full sun...

Christopher

Hello! I agree, in the initial inspection of the photo it appears to be burn of some kind. That could be sunlight reflecting and/ or pesticide - especially with 2 applications back to back, hard to say. BUT, what you should be most concerned with are how the new leaves look, more so than the old.

It is natural for your leaves to yellow and fall off, especially the oldest ones. But if you feel it's doing it at an alarming rate, then I would say it could be too much water. (or if you saw the new ones yellowing or falling) I notice you have saucers under your pots too, that will hold excess water you don't want. The soil in the little seedling looks very wet - had you just watered?

Don't be afraid to check your soil, check your roots. Is your plant root bound? Is your soil well draining? What are your temps like right now?

At this point it's hard to say too much or not enough water, but you can find out quickly by checking your soil. Your leaves are a tad drooped , so I would say not enough, and your leaves look really good other then the droop & the burn spots. The temporary move could be a big factor like the others have mentioned. Check them out & let us know & we can go from there!

Sunburn. Your container may be getting too hot as well.

I got the same black-spots problem. This plumeria was attacked very badly by spider mites last month, was sprayed with Spectracide after trying Neem oil. Then, new leaves came out very healthy. Only a few weeks and leaves started again to yellow and fall. So I got the advice to spray it again, which I did. I also noticed a leaf that had 2 black spots, very small in the beginning, but in a few days they were all over that leaf. I removed and discarded that leaf. This morning, another leaf started to show small black spots. What could it be? Please, I really need some help with this.

Thank you in advance for any input.

Mima

Thank you everyone for your help and suggestions with my plumerias. I greatly appreciate it. I will update you the progress of their condition. :)