Gather your supplies
* 1 x galvanized metal tray about 90 x 30cm, with sides
* 3 x shelf brackets to support a 30cm wide shelf
* 9 x wood screws 7-8cm long (If your wall is brick, you’ll need to use wall-plugs too)
* 9 x bolts, washers and nuts of a suitable gauge to fix the tray to the brackets
* Potting mix
* 3 galvanized buckets
* Selection of potted flowers and succulents
You'll also need
Electric drill; drill bits for timber or masonry and metal; tape measure and pencil; screwdriver to fit screw heads; hessian or Chux cloth to cover the bottom of the tray (only if using a perforated tray).
The brackets supporting each end of the tray should be 10cm from either end. Position the third equally between the two. Mark the location of the brackets on the house wall.
Using a drill bit smaller than the gauge of the screws, pre-drill holes for the screws in the positions you have marked (in masonry walls, drill holes for wall plugs, using a masonry bit).
Attach each bracket to the wall of the house, using three screws for each bracket. A power screwdriver makes this job a lot easier.
Place the tray on top of the brackets and secure in place with the bolts, washers and nuts. If your tray is not perforated, drill holes first plus a few more for drainage.
If the tray is perforated, blanket its base with hessian or porous cloth to stop potting mix from washing through the mesh.