Would you believe I just now saw your message? I thank you very kindly for your comment. No, I am not a professional, just a crazy lady who has been bit by the gardening bug. This was only the second landscaping project I ever did in my yard. I got tired of fighting the hill; mowing, moss, erosion, and the like, so I wanted to make it easier to maintain. I got a quote for a retaining wall to the tune of $10K and could not afford that, so I created this whole thing for about $1,200 in materials . Everyone thought I was nuts. I hauled the boulders on a furniture dolly with a rope attached. I got the boulders and soil delivered in one load so that I could roll the boulders off the mound of soil onto the dolly, and then roll the dolly down the sidewalk and tilt the boulders into place. Worked like a charm. And there is really very little maintenance required; I only water during periods of extreme heat and drought. I specifically The ground covers keep out weeds quite effectively. Unfortunately, one whole side of the garden was destroyed this past summer (2012) during a construction project; they would up having to pay a landscaper quite a bit to fix the damage, so it is now a little bit different and much of the mature growth is gone. As you might imagine, I was pretty upset. The restoration was done just before winter hit, and we've been a drought here for a awhile. I'm anxious to see what will happen in the spring.