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International Hardy Plant Union
Servatiusstraße 53
D 53175 Bonn

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

SUMMER DAYS

Every 2 year, we organise a Congress, now called 'the Summer Days', as a real meeting point for all colleagues. During these days the delegate – meeting takes place.

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WINTER DAYS

The aim of this conference is to promote international contacts in the Perennial Plant Industry and to provide an opportunity to exchange knowledge and expertise in an inspiring atmosphere.

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BOTANICAL EXCURSIONS

The excursions of the ISU have a long tradition. Since its foundation there have been several excursions. They either go to botanically interesting regions and give good inside view of our perennials in the wild.

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Recent news

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.

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