Repotting Help ✨✨✨

[Shadeflower]

I can't see any stem rot.
You can still burn roots even if you just feed once a month. I mention this because the only black is see is on root tips if I am seeing it correct. The manufacturers recommendations on how much to feed are usually way too strong. You should be feeding 1/4 of what is says on the label to start with maximum. See how the plants respond and adjust if necessary but never start full dose.