The broad flat leaf of the banana plant adds a tropical look to your favorite room or covered porch. Bananas can grow to heights of 20 feet or more depending on the variety. Pick a dwarf variety for growing indoors unless you have a huge growing area with high ceilings. The dwarf cavendish grows to just 6 feet tall, making it one of the best choices for an indoor banana plant. Growing banana plants indoors will bring the feel of the tropics to your home in the cold winter months.
Fill a 5 to 7 gallon planting pot half full with a well-draining potting soil mix. You can pick up a mix from your local garden store. Choose a pot that has several drainage holes in the bottom to prevent water from standing around the root system.
Place the banana plant into the pot and hold it so the base of the stem is about 1 inch below the lip of the pot. Fill in or remove soil under the root system until the banana can sit on its own in the pot.
Fill in the soil around the root system a few handfuls at a time, patting down the soil as you go. Water the plant until water drains through the holes in the bottom of the pot.
Put your potted banana in a sunny window. Air temperatures should remain above 60 degrees F to avoid damaging the plant. For best foliage growth, keep temperatures above 78 degrees F; fruit will not develop unless temperatures are consistently above 84 degrees F for the 18 to 24 months between planting and fruiting.
Keep the soil in the pot moist but not saturated. Mist the leaves two to three times a day with cool water to keep them fresh and healthy.
Feed your banana once a month using 1/2 lb. of a 3-1-6 fertilizer for the first three to four months. As the banana begins to reach full height, increase the amount of fertilizer to 1 lb. Large varieties will need 2 lbs. of fertilizer per monthly feeding.
Trim off leaves as they turn brown. Use a sharp knife and cut them close to the trunk without damaging the trunk itself. The plant will produce 33 to 40 leaves before it fruits.