Window boxes are easy to maintain once they are set up and they make a house look really attractive. If you don't have room for a garden (or even if you do) consider adding a box of flowers to your window.
I've been looking at window boxes from several online sources. I can see where they would add a lot of interest to the front of my house. I've been looking for ideas to brighten the exterior. I have a really cute house but I just think back to when my grandmother had window boxes and geraniums and it makes me a little nostalgic.