Two problems: A: Intervenal chlorosis. This has occurred in two weeks. The remaining batch of trees at my nursery are unaffected. That it's new leaves suggests an iron deficiency. But this developed during two weeks since the client purchases and planted it.
What soil conditions/ or stuff that came with the rocks can induce chlorosis this fast?
What is causing whole areas of individual leaves to turn brown? Searching for "brown areas" "cherry leaves" gives me a lot of fungal things that cause spots, but they all produce lesions all over the leaf. It doesn't look like cherry leaf scorch either. This looks more like some kind of leaf miner.
Again, this isn't affecting the ones at the nursery.