Hello. Excuse for troubling. And you could not answer the question - “How to insulate strawberries in a vertical bed made of PVC pipe? “. There is no way to clean up for the winter. The pipes are long, and a lot of them). I live in the Krasnodar Territory. In general, it is warm with us, but sometimes it happens in the winter - 15 degrees.
In the region where my parents live, it is generally impossible to save vertical beds from frost. Therefore, they are made temporary, not capital. Then at the end of the season they are simply laid on the ground, where they winter under the snow. And in the spring they put them again.