An indoor banana plant needs rich, humus-like and well-draining soil as well as plenty of sunlight. While an indoor banana tree needs more water than those grown outside, it should never be allowed to sit in water. Banana houseplants require frequent feeding, especially during their active growth in warm weather. Feed once monthly during summer. These plants also like hot (67-80F) and humid conditions.
Misting their foliage can help keep them hydrated and happy. In addition, an indoor banana plant should have its leaves wiped down occasionally with a damp rag to collect any accumulated dust. Will benefit from spending summer outdoors.
Read more at Gardening Know How: Banana Plant Houseplant – Taking Care Of A Banana Tree Inside https://www.gardeningknowhow.com/edible/fruits/banana/indoor-banana-plant.htm