Hi there, Banana experts!

I am new to the forum, and new to bananas. I live in Washington state and have an unheated sunroom attached to my house. I've got some citrus growing there through the winter, and put them out in the sunny deck after all danger of frost has passed. I'd like to add a banana plant to the family, too, and would be especially delighted if I could actually get it to fruit. I've done some research, and have narrowed my banana plant choices to either the dwarf namwah or a grand nain. Considering that the plant will have to live in a pot, and will see cool temps in the wintertime, can you advise me as to which plant might be better? I haven't seen a picture of a dwarf namwah---does it have any red on the leaves? (That would be a plus).

I understand that a plant is less likely to fruit if it sees cool temperatures, but that the likelihood of fruit can be improved if the plant is not repotted. I'd like to plant my new banana in a large enough pot that transplanting won't be necessary. What size pot would either of these bananas require?? (My citrus are planted in round platic pots -- the ones that mimic terracotta but are much lighter in weight -- the top diameter is 20". Would that be large enough?)

Thanks for the advice,

Annie

Camano Island, WA