Re: Something bad happened
Now that your banana is in the "proper light", don't touch it. Water sparingly and don't fertilize. You are allowed to watch the pot from a safe distance--2" if you keep your paws off. Seriously. This old gardener has lost many plants over the years; in hindsight I've come to realize that some of those might have survived if I'd just let them do their thing and not intervened--no matter how tempting.
Yes, do try to root whatever ever broke off as recommended by siege.
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