Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00000744
11/12/99

Hydrangea arborescens--Smooth Hydrangea


Hardiness Zones: 3 to 9
Height: 5 ft Spread: 5 ft Form: rounded
Type: deciduous shrub
Annual Growth Rate: more than 18 inches
Flowers: White

Comments: Smooth Hydrangea grows in sun or shade and
prefers rich, porous, moist soil. Transplanting is fairly
easy and the growth rate is rapid. 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 (Vis. 2) 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.

Cultivars:
'Annabelle' - An improved selection with (Vis. 1) white
flowers. This cultivar grows well in shade.
'Grandiflora' - Large, pure white flowers produced
throughout the summer.
ssp. radiata - Dark green leaves have white undersides.

References for Cultivars: Bailey Nurseries 1999, Weston
Nurseries 1999, Princeton Nurseries 1999, J. Frank Schmidt
and Son 1997, Spring Meadow Nursery 1999, Ray Wiegand's
Nursery 1999, White Flower Farm 1999, Wayside Gardens
1999, Sheridan Nurseries 1999, Studebaker Nurseries 1999,
Select Plus International Nursery 1999, Berryhill Nurseries
1999, Scarff's Nursery 1999, Gee Farms 1999, Midwest
Groundcovers 1999, Willoway Nurseries 1999,Carlton Plants
1999.


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