Answer: Vining plants tend to grow upwards. If not given support they may grow laterally or droop, but the ends or tips of the stems will still face upwards. This might produce an odd effect. What you'll have more success with in the situation you describe are trailing or cascading plants. For a sunny area, plant trailing Lantana, Ivy Geraniums, trailing Rosemary, Nasturtiums, English Ivy, Sweet Alyssum, Basket of Gold, Creeping Jenny, or Aubrieta.
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