PIIHM-II

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Hydrangea macrophylla (Thunb.) Ser. Bigleaf hydrangea · Ornamentals · bred by Michael Dirr

also searched as: пиихм ии

Variety description

10 August 2026

The plant is a shrub with a rounded, spreading crown shape, reaching 90–120 cm in height and up to 150 cm in width. Characteristic features are strong red-purple stems and dark green leaves with red petioles and veins, which acquire a burgundy-red hue in autumn.

The inflorescences have a spherical shape (mophead type) and reach 9–13 cm in diameter. Depending on soil acidity, the flowers are colored in violet-blue or pink-purple tones. The variety is remontant, forming buds on both previous year's wood and current year's shoots, which ensures continuous flowering.

The plant is characterized by winter hardiness (USDA zones 4–9) and resistance to powdery mildew. It is used in landscape design for group and single plantings, as well as for container cultivation.

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Countries of admission

1 jurisdiction

Green indicates countries where the variety is listed in the national catalogue and its seeds are authorized for sale. Expired registrations are marked separately: the variety was previously admitted, but sale is no longer permitted.

IS FI NO SE EE IE GB DK LV LT NL DE PL BY PT ES FR BE CZ SK UA RU LU CH AT HU MD IT SI HR RS RO MT GR BG CY

no record

Variety registered as early as 4 jurisdictions, data for which we do not publish: their registry licenses have not yet been verified. This section will be available upon verification.

Also known as

breeder code TNS 01-09

A single variety may be registered in different countries under different names. All records are consolidated into one profile based on the breeder's code—an internal number that is identical for the variety across all registries.

PIIHM-II primary AU, CA, US
PIIHMII GB, QZ

The primary name shown is the one under which the variety is registered in the largest number of jurisdictions. Search finds the variety by any of its names.

Variety in registries Regions of admission, rights holders, and status of plant breeders' rights

Parties

Breeder: Michael Dirr 5 Developed the variety
Applicant: DIRR Michael A. / KARDOS Joshua H. Submitted the application to the register
Rights holder: Bailey Nurseries, Inc. 63 Holds the rights to the variety

Plant breeders' rights

The right is granted for a limited term: propagation of the variety requires a license from the rights holder.

United States of America № 13694187

Active

Application filed 5 November 2012
Registered —
Currently active indefinite in the register

More 4 records protections in other jurisdictions are shown on the map above.

Records are sourced from official registry publications. Data sources and legal status

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Breeder

Michael Dirr

breeder code TNS 01-09

All 5 varieties of company

Registry records

Total records: 5
Jurisdictions shown: 1
Not yet disclosed: 4
First registration: 2015

Same species