Hydrangea umbellata, the umbel hydrangea, is a early blooming lace cap type Hydrangea that is cold hardy and also heat tolerant and sun tolerant. The following are some pictures from the Scott Arboretum at Swarthmore College in Pennsylvania.


Current commercial horticultural information from the Cooperative Extension Office in Kent County Delaware, an outreach arm of the College of Agriculture and Natural Resources at the University of Delaware.
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