Got pics to add?

I have had the same issue, mostly with newer plantings. My soil test is very similar to yours. Because of the alakaline soil and the amount of rain we have had, someone suggested that it was an iron/ ph issue. I used this product Iron and it really helped. I think I only used it once, maybe twice on a couple of hydrangeas. Seems safe, and it pretty inexpensive.

I'm thinking iron issue as well. I just applied Milorganite which is rich in iron.

I'll have to check out the product at the link. Did you use the 1 teaspoon per gallon dosage for the soil drench?

Try to get pics tonight.

Just a "from my experience” info ... my yard (multiple test spots) reads at 8.0.. and I get decent chlorosis on some susceptible perennials... and then on a few trees that came with the house.... but then just a yard away are the same contractor trees without any issues at all. Could the “pockets” of different PH be a reason for your issue?

And last… the iron will only help the plant as a foliar spray and not as a soil drench… if your soil by chance has a spike of ph around these problematic trees. High ph and the roots can’t pull up the iron from the soil. The foliar application though will be a good way to see if it’s an iron issue in the first place.

I think I did use the teaspoon/ gal. I did the soil drench and it worked fine, but if I use it agin I’ll probably put it in a hose end sprayer. I like the Milorganite too, but I think it’s not chelated? And being organic will take a while to be absorbed.