mm4birds

I have a banana plant I got in the mail with a large healthy pseudostem and white corm but no roots which I planted in potting soil and watered carefully only watering when soil was dry down to two inches. I see no new growth on top and now the pseudostem is starting to dry on the outer leaves even though the underlying pseudostem appears very healthy. I am worried that the plant will shrivel up and die and here is my dilema - I am on the fence between too much water on the one hand rotting out the corm and not enough water and drying out the plant on the other. Please advise what to do. Am I just crazy with fear about losing the plant or should I worry?