Re: PVC Banana Greenhouse
I've found that the pseudostems on my musa basjoos are hardy with light freezes down into the mid 20s without much damage, and if you are in zone 8b, you might not even have to wrap it with a greenhouse.
I use shrink wrap too, and one thing I would suggest is to first shrink wrap the pseudo-stem before wrapping up the entire thing because keeping the moisture inside helps the most. Bubble wrap might work too if you have it.
Being in zone 6a, I need to use barrels that are cut open on the bottom and stuffed with leaves to over winter mine.
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