Dilemma on my Landscaping

I've been brainstorming. A lot. You see, I have these "useless" flower beds around my house. 6 inches down, there is concrete. A lot of it! So nothing can grow there. What can I do with these areas? I don't want to take them out and leave the grass to grow up against the house. Suggestions on what I can do in these areas to improve the curb appeal to my house?

The "flower bed" on the side of my house