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

24 Feb / 2023

Varied programme with top-class speakers.

22 Aug / 2022

General Assembly in Nijkerk decides ISU meeting on future topics 2023.

22 Aug / 2022

Ten growers or companies sent in a total of 51 novelties from 27 genera for ISU screening.

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