Hi there, Palram fan here, especially of our octagon Oasis. It's my 2nd full winter season and I can tell you that a good wrapping of bubble wrap makes a difference! We hoping to get the greenhouse wired up soon. We also switched to solar this year, so that helps. We did not have wildly crazy heating bill last year despite not insulating.
I keep the greenhouse, 6a, SE Michigan, around 40-50 degrees into December, and after that, above 20 because I keep only hearty herbs in there. My rosemary LOVES it. I use a Govee to monitor the temps.
Here's a little Insta video about my set-up as of this November. I hope it helps:
https://www.instagram.com/reel...
Little greenhouse fan,
~ Deb
First year:
Last fall
Winter herbs doing fine all winter, January 2023:
