As a kid, I had an aunt that had a shelf on her windows were they meet in the middle for plants. Of course, I didn't even look at how they were made or ask about them. My house has porch on 3 sides with the only side not under porch is on the north side of my house. I can't get plants to grow or live because of all the shade in my house and would love to get or make shelves for several windows so I can at least have a few plants. Does anyone have any ideas on how to make, get info on or get some of these shelves?