any idea what is happening to my plumeria tree??

Anyone ??????

I've never seen one exactly like yours. I did have one that had mottled leaves and mine turned out to be a bad spider mite infestation. Do you see any sign of them on the underside of your leaves if you use a magnifying glass or loupe? They are extremely small, and sometimes have some small webbing.

That would be my first thought too, spider mites. Have y'all been dry for a while? You could also have a severe Mg deficiency, but mites are what you want to rule out first. I dose all my plumeria (and orchids) with Mg every 3-4 months. With the plumeria, they get a dose in the spring and then get a second dose in mid-summer. To keep spider mites in check (I simply don't ever see them), I spray all the leaves of my plumeria every day, either in the AM or late afternoon. Mites don't like the wet.

What's MG? And where do I get it lol

Magnesium, aka Epson salt. This can be found in any big box store or drug store. I get it in 5lb. bags and it is cheap. I dilute 1 tablespoon per gallon but some folks just sprinkle it on the potting soil and water it in.

Will try that this after noon!! Thank you! Does MG bring back the green?? Shall I sprinkle or dilute ? What's your preference ?

I have a granular applicator that attaches to the hose. It automatically dilutes as it sprays. I use it to drench my plumeria and orchids, leaves and media. I use this either in the early AM or late afternoon. But keep in mind I have over 80 potted plumeria. If you are only treating a handful of plants, I would mix up a 5 gal. bucket and put perhaps 1/2 gal. of solution per pot. If your leaves are all looking pretty forlorn, I would use a pump-up sprayer and spray the solution over the leaves to give quicker response. Oh, I spray down those leaves again in the late afternoon (if I sprayed the Mg in the AM) or the next morning for the PM application. I am simply washing the mineral residue off the leaves. Since you are just starting to use Mg, I would repeat the application in 2-4 wks. and then get on a twice-a-year schedule. I will be the first to tell you that I don't know that my applications of Mg make a bit of difference, but my leaves sure are lush and dark green.

Maybe I can mix a couple gallons of this and use it in a spray bottle and drench the whole tree, eh??

That sounds like a good plan, Mark. Be sure you hit the undersides of the leaves well. That's where the mites like to lurk.

Could you find any evidence of spider mites? The only time I ever have these mites is on plumeria that overwintered in the solarium last year. The infestation didn't even affect the plants, I just saw the tale-tale sign of the fine webbing. I gently scrubbed the leaves every few days, top and bottom, with plain water and in a week or so, there were no more mites. They don't like the moisture, but since the solarium has central air and heat, it is far more dry than growing the plants outside. Of course, we have lots of constant humidity and y'all in San Diego probably don't.

I have not seen one like it before too Mark. Keep us posted.