Answer: Deformed leaves can be caused by insect feeding or a result of forced growth. Musa is fast-growing even in average soil, so I suspect its high-nitrogen diet is accelerating growth to the point that the roots can't keep up with the demand of the foliage. Hold back on the fertilizer applications and allow your musa to grow at its own pace. New foliage should develop normally and as the leaves mature they should take on that red hue that makes them so attractive.
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