Hydrangea arborescens--Smooth Hydrangea

By The Old House Web

Hydrangea arborescens--Smooth Hydrangea

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Smooth hydrangea grows in sun or shade and prefers rich, porous, moist soil. Transplanting is fairly easy and the growth rate is rapid. Smooth hydrangea grows 4 to 6 feet tall and spreads 5 to 8 feet. The plant often dies back during the winter, and if it's not pruned in early spring, the flower clusters become small. The white flowers are produced in midsummer and are green at first. Old flowers turn brown and persist on the plant for some time. The canes tend to be fairly weak.

Two cultivars are listed: 'Annabelle'--large flower clusters; 'grandiflora'(Hills of Snow Hydrangea)--all flowers sterile and showy; probably the most common cultivar. Use these cultivars instead of the less ornamental species.

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