I was thinking along the lines of large planters that are permanently placed outside and not moved. I would like to plant something under a large invasive type tree. I do not have anywhere to store containers and I am not able to move them anyway. I would like to put perennials in them, maybe a small shrub like an azalea. I don't think clay or ceramic can overwinter outside here and I don't know about the styrofoam. ? We get lots of snow, ice and temps down to 0 or below, so freezing/thawing is a problem here.
