I could be wrong part of the problem is too much water if u are using clay soils like me and maybe u need a higher nitrogen fertilizer but I will admit I'm no expert

All in all your tree looks to be OK. There is a little leaf tip and edge burn. This is most likely due to a build up of soluble salts in the soil. Flush the medium with clean clear water in the amount of twice the volume of the container.

I used citrus plant soil. Thanks for the tip I will give it a shot. Any idea why some leaves are nice and soft and why some are hardened and rippled? Is this normal? Thanks again!

like I said I'm no expert rinch the pot ineed a lot of water to flush the soil or re pot with new soil

Well I flushed our the plants on Friday. however, over the past few days I’ve noticed severe deterioration on one plant. The leaves seem to be wilting and turning brown

time to let the soil dry out like I said the only other option was to repot with fresh soil