campanula covering stone wall
Photo: Kurt Stuber/Gnu
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61. Rejuvenate with Flowers

Soften the hard edges of a masonry retaining wall with trailing blooms, such as campanula. The perennial thrives with little upkeep and offers big bunches of violet flowers.

Campanula 'Trailing Bellflower,' about $5 for 500 seeds; springhillnursery.com
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