Re: how big does my greenhouse need to be?
I agree with John, but if you're really just concerned about the one banana you can do okay with 10' x 10' and 12' high in the peak would be tall enough. Mine is 16' high in the center and it certainly wasn't tall enough for my Ae Ae. I thought about building a tall door to facilitate moving things in and out but decided not to, figuring I could always remove some film temporarily, if needed. Instead, I really had a struggle getting my big Ae Ae out earlier this month. You might try some other small ones like Logee's Dwarf Ladyfinger.
Welcome and good luck!
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