One of the neighbors down the street did that with the patch of ground between the sidewalk and the street. Even though it's not a large area, she mixed in several different plants for the butterflies and it's amazing how many of them it attracts even in that little bit of space. Her biggest struggle is with keeping people from letting their dogs piss on the plants. Even with signs asking them to please keep their dogs from harming the plants there are some people who just don't care.
