Rocky Knoll Farm

Grandma’s Hat


Grandma’s Hat displays beautiful trusses of rich purple flowers that fade to white on the inside, which provides an excellent palette for the incredible dark purple pattern. This medium-sized rhododendron blooms in April-May and can thrive in partial shade to full sun. Able to reach 5' in height, this hybrid is hardy to 0°F when protected from windchill. 

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