I'm hoping this is the right place to put this question. I've built a window box that I'm mounting and hoping to plant today. As it's on the 'short wall' of our coop and will more than likely be reachable to our girls once they're grown, I would love to fill it with plants that they find appetizing. Something that will also hopefully kind of 'spill out' of the flower box, rather than being nice and tidy within. Any recommendations? The area is, for the most part, pretty shady during the summer, so it would also have to be something that does well in the shade. Thanks!