Posted: 02/03/2016 at 15:18
Were you thinking along the lines that Pansy said?
If you were thing of one of those plastic types, they you have To make sure they are really well fixed to the wall. Put two eye hooks in the wall and tie a rope around, do this at the top joint, where the uprights meets the roof bars. Otherwise it will off, plants and all.
If you can do that, they will be fine for a year or so, you can buy new covers for them, usually the Zips break.