Answer: You plan sounds like a good one. Since it's a sunny site you might also consider growing scarlet runner beans (these will provide a dense screen of green leaves with attractive reddish-orange flowers), hyacinth bean, Ipomoea (morning glory vine) or Cobaea scandens (Cup and Saucer Vine). If there's a fence or you can provide a string trellis, each of these plants will provide the coverage you're looking for.
Good luck with your project!
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