Growing sweet potato greens in window boxes is a great way to get a big bunch of almsot perpetual greens. My main focus was only for the greens. They grow so easily and have prolific foliage. Those boxes were kind of beat up when I got them and look even worse today. And I reached a point where I felt it was time to rotate out the greens and probably trash the window box. I was pleasantly surprised when I found there were some tubers in there too! I wasn’t expecting that.