One last comment - I forgot to film this part but I did add a flat head nail to the underside of each corner of the boxes. That way any water that soaked through the soil and out the bottom holes in the plastic insert had a way of escaping out the bottom of the planter boxes.
Again, if you want to make a few of these tapered planter stands yourself, be sure to click on the link below or at the top of this page. Thanks!