You can either grow banana plants outdoors or indoors but the most important thing is to plant it in organically rich soil that will supply all the nutrients that are needed. They are pretty easy to grow. Musa Basjoo are the best to grow in the UK as they are root hardy, and only require protection from a straw / fleece wrap to get them through the winter. Ensete bananas require being brought into a heated area to survive an average UK winter.