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International Hardy Plant Union
Servatiusstraße 53
D 53175 Bonn

Telephone: +49 228 81002 51
E-Mail: info@isu-perennials.org

24 Feb 2025

110 perennial gardeners and enthusiasts from 16 countries met in Grünberg from 14-16 February for the 17th time this year to exchange experiences and meet colleagues.

24 Feb 2025

The International Hardy Plant Union is professionalising itself and its image. After years of discussion, the board, which has been newly formed since August, has commissioned a logo and corresponding templates for its media and presented them for the first time at the ISU-Winter Days in Grünberg in mid-February.

26 Aug 2024

29 perennial novelties were entered for the International Hardy Plant-Union (ISU) trial in Angers. 25 could be evaluated, reported Jonas Bengtsson, President of the ISU Trial Commission at the meeting on August 11 in Angers.

26 Aug 2024

The International Perennial Union offered the almost 60 participants of the Summer Days from August 11-15 in Angers, France, a very diverse program. Perennial experts from 12 European countries and the USA met there from variously structured companies and enjoyed the professional exchange as well as the typical local culture.

26 Aug 2024

The board of the International Perennial Union (ISU) is now younger and more female following the regular re-election. ISU-Chairman Aad Vollebregt from the Netherlands did not stand for re-election after 12 years, as did Beate Zillmer from Germany and Michel Le Damany from France.

26 Aug 2024

Close cooperation with perennial gardeners is necessary for both the planning of urban greening and planting, explained Alice Evain, head of the green space department of the city of Angers, during the visit of almost 60 participants of the ISU Summer Days in mid-August.

01 Mar 2024

One of the main aims of the annual ISU Winter Days is to exchange personal experiences about perennials, their natural habitats and their use in design on an international level.

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