Not to butt in. but i use plastic
to protect my bananas. I do not see a prob. with you leaving on the plastic for a few days. But!! i would not leave it on for no more then 2 days straight. Plastic is something that you want to remove everyday, unless you have freezing temps. during the days to. Moisture and plastic are not good for long periods of time.One more thing. Make sure that your plastic sheets are colored.Black,Green, blue.... any dark color. Clear plastic is no good. You lose the heat that the plastic traps to easy. The color helps keep the heat in. I learned the hard way a few years back using clear plastic.That is why i use tarps to wrap. good luck!