iI was painted to protect it from the sun. we are zone 7 I don't know if the
roots will make it through the winter with such little protection. I have had pvc laying around outside now for seven years at my current place. It was leftovers from who knows where, then it was horse jumps and cavalettis, it has been temporary drain pipes and electric
fence posts. I've hacked odd pieces for cheese presses and for various projects. There was one that apparently rolled into the creek at some time and I found it when the goats cleared the area recently, still intact. It has lasted well. The strawberry tube was built this spring. we shall see! so far this is the only strawberry planting I haven't seen not over run with bermuda (locally). Any perrenial stuff is a PIA here.