Yellowing leaves after repotting

[sosamo]

Hi, last week I repotted my cherimoyas, sugar apples, and atemoyas.  Right now I have 2 trees that were fine before, not doing well now.  The sugar apple leaves are curling up, drooping, turning yellow, then black, then dead.  One cherimoya, the leaves are getting yellow, then fall.  I have attach a pic.

After I repotted them, I water it with a mix of water, B1, Iron/Zinc. 

1. I did put too much Iron/Zinc or B1 solution in the mix?
2. It's not under water because the moisture leave is past the green mark on the water tester (so maybe too moist)
3.  Should I flush the container with plain water, maybe with some epsom?

[sosamo]

[K-Rimes]

Tis the season. I think as it gets colder this seems to happen to most cherimoya leaves. Mine have all suffered fairly badly when I repotted them in Spring, same for the one I put in the ground a few weeks ago. They are all fine now.

[sosamo]

Tis the season. I think as it gets colder this seems to happen to most cherimoya leaves. Mine have all suffered fairly badly when I repotted them in Spring, same for the one I put in the ground a few weeks ago. They are all fine now.

Definitely hope so because other trees Cheri/ate/sugar are fine, just these 2 guys.