International Hardy Plant Union
Servatiusstraße 53
D 53175 Bonn

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


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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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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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 Oct / 2023

Practical exchange of information at the ISU Future Days
The world is full of perennial enthusiasts, people who are passionate about perennials and who are passionate about sustainable development.

26 Oct / 2023

External transfer also a topic at the ISU Future Days
Nearly 70 participants from 13 countries attended the conference in Prague.

24 Feb / 2023

Varied programme with top-class speakers.

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