I think those would make an awesome flower bed. You could always raise the "headboard" up a little by putting it up on bricks or something. You'll have to have side rails made for it as well...the actual sides of the bed. My only suggestion is to make sure that you make your sides deep enough...at least 10-12 inches. The plants will appreciate it more. I have one that I am going to move this spring and make the "mattress" part deeper. My hubby put 2x4's across the bottom, then I put a piece of vinyl lattice as my base and put weed cloth on top of that so that the soil would stay in. It works fine, just needs to be deeper. Good luck and post pictures when you're finished!

Those gaps of missing mortar between bricks on the bottom course are known as weep-holes. They're there primarily to let any moisture out that accumulates between the back of the brick and the moisture barrier. Depending upon how/when your house was built, the ledge that the brick sits on might only be an inch or so lower than the main slab where walls and flooring reside. So even covering just the bottom portion of the holes is a bad idea since it can enable water to backup to the base plate. Amount of roof overhang, 1 story vs 2 story, and other factors affect how much water will penetrate and drain behind brick veneer... but it is a surprising amount. We learned about their importance when the builder's subcontractor inadvertently left them off our first house. A 2-story with no roof overhang made mess of our first floor carpets the first few heavy rains until the problem was identified and a mason chiseled out the weep-holes. Roselee's experience with termites entering these is very common and something a good inspector will warn about. Ours recommends keeping any soil or mulch at least an inch below the bottom row of bricks. We've had to regrade the uphill side of our house to accomplish this and get some slope away from the slab.

jekeesl, I think that's it. It is said that it's used in Chinese medicine and Ayurveda, but I don't think I will keep them. The strange thing is that they only invade the flower beds in the front and nowhere else.

Also there's a limb that I want to prune off the oak in front of your house.