I bought a banana tree about 3 years ago, and since then i have removed pups and transplanted them in farirly large nursery containers they are now about 6 ft tall, Idont remember the type that i have, buti bought them from a nursery cataloge.the leaves are very large, but a cuople of the trees leaves are getting a yellow on the rim of the leaves .also there there is a brown drying on the outside of the leave.Is this normal? or can this be prevented?

Thank you

P.S. No bananas yet