International Hardy Plant Union
Servatiusstraße 53
D 53175 Bonn

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

Botanical Excursions

The excursions of the International Hardy Plant Union (ISU) have a long tradition. Since ISU foundation there have been several excursions. They either go to botanically interesting regions and give good inside view of our perennials in the wild, or the program is dedicated to garden culture, visits to interesting parks and gardens as well as to botanical gardens.
On these ISU excursions plant and garden enthusiasts meet each other, friendships are made and maintained.


*** CANCELED ***

ISU-Botanical Excursion to Armenia
24th of June – 7th of July 2021

Armenia is a small mountainous country located in the Caucasus Ecoregion - one of the Planet’s biodiversity hotspots. With the area of just 30,000sq km the country is remarkable for very rich and diverse flora and vegetation. Flora of Armenia includes about 3800 vascular plant species, 144 of which are local endemics. Here one can observe the abundance and diversity of plants and landscapes just in some hours of driving - most of the main habitat types characteristic to the region are found in the country.

Excursion to the Pyrennes 2019


Excursion to the Pyrennes 2019
30th JUNE – 29th JULY 2019

26 people coming from seven different countries ( France, Belgium, the Netherlands, Switzerland, UK, Germany and Sweden) explored the botany of the mountains in the Pyrennes.

Excursion to the Pyrennes 2019





ISU - International Hardy Plant Union | Imprint | Data Protection Policy | Contact