Remove your banana plant from its container. Remove unwanted pups, being sure to leave one attached to the plant. Lay the plant on newspapers to protect your work surface if you are repotting the plant indoors.
Choose a strong container at least twice the diameter of your present container. Fill the container halfway to the top with potting soil.
Place the banana plant into the container. Fill the container, packing the soil with your fingers. Make sure that the top of the corm is at the same level as it was in the previous container.
Place your banana in the brightest indoor light your have or outdoors in full sun. Add slow-release, high-nitrogen fertilizer pellets at the rate of 1 teaspoon per gallon of soil. Mix them into the top inch of the soil and water the plant well.