Yes, the old idea of cutting car tires into planting pots isn’t new, and it’s an acquired taste for many.  Even tacky sometimes.  Wen I found this really well conceived tire fountain it was strangely appealing, made interesting by the way the minerals built up at each spill point around the top creating stripes.  Found it a few years ago at the San Francisco Garden Show demonstration area that emphasized recycling before the big “green” revolution.  Haven’t seen another one since.  It’s a great idea for the do-it-your-selfer guy who loves to play with little pumps and car stuff, offering a fun joint venture between the automotive aficionado and the garden maker in the family.