My neighbor in Springfield tried a similar program and had the opposite problem. The native plants they gave her spread into her flower beds and took over within two months. I mean, she spent more time pulling those "low maintenance" plants than she ever did mowing. My own yard is small and I like having a clean patch of grass for my dog to play on. Maybe it's just me but I don't see the point in trading one chore for a different, messier one.