Q.I need a hardy perennial vine like clematis or something that is resistant to extreme cold.
I came across a picture of a stack of cinder blocks used as planters for succulents, and thought about the idea of using that concept, but with flowing flowery vines flowing down out of the top with smaller perennials in some of the side spaces. I live in zone 6 and wondering what, if any, perennials would be good for such a prospect. We have a corner of the backyard where this would be awesome. Thanks very much!

Certified GKH Gardening Expert
Sure, there are several options for you. These articles will help: https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-5/hardy-vines-for-zone-5.htm
https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-6/zone-6-flowers.htm