a retaining wall with climbing hydrangeas
Photo: Arco Images/Alamy
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Rooted along the base of the wall, these plants grow up in search of sun. Most benefit from a trellis to help get them established. You can usually remove the support after a year or two.

Shown: Climbing Hydrangea (Hydrangea petiolaris)
Clusters of fragrant white flowers stand out from this vine's heart-shaped foliage in summer. Grows up to 80 feet high and 12 feet wide in Zones 4 to 8.
About $25; Wayside Gardens
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