ALEXANDRIA, Va., March 19 -- United States Patent no. PP36,558, issued on March 18, was assigned to HYDRANGEA BREEDERS ASSOCIATION B.V. (De Lier, Netherlands).
"Hydrangea plant named 'HP221904'" was invented by Niels Arts (Aalsmeer, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "A new and distinct cultivar of Hydrangea plant named 'HP221904', characterized by its relatively compact, upright to somewhat outwardly spreading and rounded to conical plant habit; vigorous growth habit and rapid growth rate; freely branching habit with strong, thick and sturdy stems; freely and uniformly flowering habit; large rounded conical inflorescences with numerous light yellow green-colored sterile flowers that b...