I'm tempted to tell you it is either mildew or rust - but those who do not live in SW FL might think I am referring to real plant diseases! LOL I'm in Cape Coral and have had similar issues on some of my plants, especially jades. We had 46 inches of rain in 4 months. I was rusty and moldy, too!

Is it primarily on the lower, older leaves? New growth looks good? And the stems and branches of the plant look good? I have just about decided that it is edema of a sort.

When I try to scrap off the dots, it digs a hole in the leaf, so I don't believe it is scale. We have also had a lot of mealies (I don't see that on your leaf or my jades) and aphids (which tend to hide from me). Trying a q-tip in alcohol doesn't work, either.

Since some of the plants have more damage, and I haven't entirely ruled out some sucking insect, I think I am going to treat with Bayer 3-in-1. It is finally dry enough for me to treat and control the water they receive.

I don't have this problem on all of my jade, which I find a little curious. I'm sure open to other suggestions and a different diagnosis!

I think it might have been all the rain we received. Once the plant dries out it may be better.

Thanks for the information.

Interested if treatment includes removal of affected leaves? I suppose I would anyway to improve the look, but is it necessary to stop progression of the problem?

ez