palmtree

Looks exactly like my Blue Java looked back in August 2010, so I defintely think you have the real thing. They grew slowly for me in containers, but they grow really fast in the ground (mine got about 3 feet of new p-stem in the ground this past year). I got mine in April 2010 as a small 1-2 foot tall plant and today its 9 feet tall to the tallest leaf. I dig it up and bring it indoors during the winter.
They are one of my favorite bananas, but I also like Sabas which is my fastest growing banana

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Location: New York City, zone 7b