Thank you guys for your replies.
Although is possible I truly don't recall water sitting on the leaves, I am very careful with that, I was more preocupied for it to be viral/fungal
I hope it recovers fine, this phally is been through a lot, root rot, rejected s/h, root rot again, and now is dormant, no growth of any kind but this leaf... and the tip rotting
anyway I'll keep you posted, and I'd appreciate any advise on boosting the root growth other than KLN (tried already
)
Thank you!!!!!