[Sasha2000]

I have a hedge of Photinia fraseri along the alley. And, yes, know hedge is not good with these plants. However, they were here and over 10' tall. Can't bring myself to chop them down until there is a good reason.
My problem started about four or five years ago with 1 plant. Then skipped over 3 plants. Then another one or two next to the original problem. No more have gotten involved in the last 2 years, but the problem still exists.

Symptoms: yellowing leaves turning to white (and I mean really white). Tried Ironite, Tried Epson Salts, Tried Miracle Grow, Tried Muracid, Tried slow release iron products, Tried high nitrogen. Seemed like it was getting better, but I was mistaken.
And it is not fungus Entomosporium. But I sprayed Benomyl for the first year as soon as 1st yellowing showed up since it's highly contagious and is a problem in Dallas, but not so much in my neighborhood.
No spots, no falling leaves. It's only on 1 side of the row, about 3 plants out of about 20.
Brand new leaves are coming out chlorotic, yet there are still a lot of branches on the same bush that are green.
Any thoughts?

 

[downunder]

I'll have to ponder on this. But I'll share this with you.

I planted 28 hanging baskets. Pink wave petunias and light and dark sweet potato. Almost all the petunias went out one by one. Two in each basket (22 inches) and potatoes are doing fine, one petunia fine and the other gone. Then, both petunias gone. One petunia is fine on his side but as he grew across the basket, that side of the plant began to decline. I think an autopsy is in order. But enough of that.

I'm thinking something site-specific. Maybe a soil problem, soil contamination, etc. The white part is throwing me- not had that before. Isn't learning fun? More fun when someone else is paying for it though.:thumbup:

 

[Sasha2000]

Good luck pondering. It is outside the fence along the alley, so something could have been poured out there. The possibility of that is kinda slim since I know the habits of all my neighbors. It would have to be an outside source. I had considered that and when I weed out there, I do look for bugs, oily areas, etc. The soil, if you can call it that, is about 2" of actual soil and then there's the collichi. That would be a calcium carbonate on top of limestone. However, except for azaleas and other acid lovers, most plants do pretty well. I'll try to get a picture posted.
Thanks for adding different perspective, I do landscaping, as well as remodeling, and I have always been able to solve clients odd problems, but this has got me stumped and now it's almost becoming an embarrassment.

 

[downunder]

When you say white leaves, I suppose you mean the leaf itself and not possibly powdery mildew? Just a thought that crossed my mind.
Later.

 

[Sasha2000]

Nope, no mildew, although with the rains we have had lately...