Hello all. New to growing bananas but receptive to all opinions and knowledge. I got this ice cream nana that initially was growing like gangbusters until the beginning of July. It had this funky-looking leaf that appeared real dark around part of it and it wouldn't unfurl. So I wait and wait and wait and it still wouldn't unfurl like the previous leafs had. So I get tired of waitin and lookin at it and out comes the scissors. I cut it back a little thinking that the new leaf might emerge somehow. Nothin. The plant is not growin... no new cigar leafs (or whatever the term is for the new leafs); it's completely stagnant!!! BUT I do have a pup that recently sprouted right next to it and it's startin to take off. I'm lost....
Here's what I have done...
The banana stays in shade for the better part of the day except for the mornings. I have also given it Muriate of potash recently and a few days later Espoma "Plant-tone". The Espoma (5-3-3) contains the esssential 15 nutrients; I was thinking this might offset whatever calcium and boron deficiencies if that was the problem I dep water every other day aboot 4 hrs for 8 gallons total.... Nothin!!! But the pup is doing pretty well.
I apologize if this had already been discussed elsewhere; I did search thru many of the threads and couldn't find an exact answer. Suggestions? Am I doing somethin' wrong? I can submit pics if need be. How much does the heat factor into this. This has been the hottest July on record

Avg temp (highs and lows) 98 degrees. Talk to me. Thx in advance.
Rob