That is my worry too on my 4th attempt..I am running out of summer
For myself, I would be happy enough to see some leaves open at least, then I am sure it has indeed rooted..getting the inflo before the leaves, would be nice, but does not count either..need to see the fully formed leaf. ..but till then, will just hope it will not end up getting blackened tips or rotted base. See I got many attempts
so you are in good company in rooting plumies. I have a back-up now though, I got a rooted plant from Ken.
Will look forward to your updates!