Toward the back of our yard I had a tough time planting trees and shrubs. I could dig about a foot down, then I would hit rock. Luckily I was able to get a few shrubs planted, but I wanted to add more height. I had a couple metal pipes left over from a work project, and I had the perfect idea for them. I decided to stand them on end and put plants in the top. I also painted them just to add some more color to our backyard.