Patent PP20595 was granted and assigned to Spring Meadow Nursery, Inc. on December, 2009 by the United States Patent and Trademark Office.
A new and distinct cultivar of Hydrangea plant named ‘Sonmarie’, characterized by its relatively compact, upright and mounded plant habit; strong and sturdy stems; and large hemispherical inflorescences with numerous light red purple-colored sterile flowers.