I agree that vining plants aren't the best idea, unless they are something that the chickens love to eat. Planting flowers near the chicken coop, especially flowers that repel insects and are great for chicken food, can really beautify the coop/run. We love lavender, catmint, nasturtiums, mint, and lemon balm. Flower boxes around the coop windows, filled with mint and lemon balm, really help with the fly population, and they help keep the chicken smell down as well. The catmint and lavender are both perennial, and can make the area around the run look pretty. Add to that, the chickens can peck at it through the wiring, so they get a nice snack without being able to tear it out at the roots. That's my two cents!