I second the scarlet runner bean idea. You will have to protect them early on, but they can be planted from seed, germinate quickly, will grow up a fence, have beautiful red flowers, and produce a really interesting green bean that is a little fuzzy and flat, but with really delicious old fashioned bean flavor. They are annuals, obviously, and will need to be replanted each year. Grapes might also work well and will become woody, sturdy plants, producing LOTS of THE most popular treat in the world, at least in my little chicken family. I don't know how they do there - we don't have to worry nearly as much about invasive species here - you don't want something around? - don't water it, problem solved. Well, with a few unpleasant exceptions.
Edited to say sunflowers also a great idea.
Edited to say sunflowers also a great idea.
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