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The PIWI-CH association

Executive Board

  • Roland Lenz, President
  • Edy Geiger, finance and member management
  • Bruno Bosshart, Representative of PIWI International
  • Fredi Strasser
  • Bea Steinemann
  • Ruedi Schödler
  • Daniel Schwarz

Become a Member

In our brochure you will find information about our club and a registration salon.

Brochure (PDF)

Or register interest at info@piwi-ch.ch
We will then contact you!

Latest News

Fungus-resistant grape varieties - the new PIWI book

Caring for vines organically, enjoying pure natural wine - the PIWI book    PIWI Book Strasser Cover
  • Big on the rise: ecological viticulture with fungus-resistant grape varieties (PIWI varieties).
  • The book by PIWI pioneers Fredi Strasser and Franziska Löpfke, Willimann Jürg (photographer)

ISBN: 978-3-258-08187-8

"I don't want to spray my vines!" This idea has driven the Swiss agronomist and organic pioneer Fredi Strasser since his youth. Thanks to the rediscovery of fungus-resistant grape varieties (PIWI varieties), his dream has become a reality: With his family, he has built a successful biodynamic wine-growing business with resistant grape varieties in Oberstammheim, Zurich, for decades. He explains his rich practical and technical knowledge here in easily understandable language for those interested in viticulture and experts. He describes a new way to natural viticulture, to good PIWI wine and how nature and biodiversity can be found alongside commercial operations.

1st edition 2020
248 pages, around 260 photos
hardcover, 15.5 x 22.5 cm, 709 g
Haupt Verlag
CHF 39.00 (RRP) / EUR 34.00 (D) / EUR 35.00 (A)

The book is available in bookshops or directly from the publisher.   
Only bulk orders directly from Fredi Strasser or via PIWI International. Please do not order single copies from PIWI International.


Report in the Andelfinger Zeitung
August 31, 2020|

Biodiversity hike and 1st general meeting PIWI CH

President Roland Renz
The PIWIs are coming ...

On Tuesday, June 30, 2020, almost 60 people met at the Roland organic wine estate and Karin Lenz on the Iselisberg in Uesslingen. The PIWI CH association, founded in December 19, invited to the first general meeting.

In beautiful summer weather, those present set off on a hike through the vineyards of Uesslingen in the lower Thur Valley (TG). Various stops were made on the way. The enthusiastic organic and PIWI winemaker Roland Lenz (two-time organic winemaker in Switzerland) drew attention to the different vineyards and types of viticulture. In an organic farm, a lot of flowers and herbs, sometimes shrubs, grow between the rows to offer beneficial species a home. FIBL's Bea Steinemann reports on the latest attempts to optimize the seed mix between the rows of vines. The hikers also become aware of the differences between European vines and the newly cultivated PIWI varieties (PIWI stands for fungus-resistant and means “robust in cultivation”, ie little to no spraying against pests and diseases has to be carried out). Of particular interest were the references to missing rows of vines in favor of shrubs, the distance to the next trees or the additional insect hotels, all to promote biodiversity.

Back at the Lenz winery, the hikers were happy about the water break before the actual general meeting began. The PIWI CH association was founded last December as a regional section of the PIWI International umbrella organization. The association's goal is to promote PIWI grape varieties in breeding, cultivation, marketing and enjoyment. The association's activities such as participation in the Agrovina or a planned wine and dine in the well-known Hiltl restaurant in Zurich serve exclusively with PIWI wines with certain new taste experiences. The association also publishes the "PIWI WEIN ZEIT" brochure. The readers are connoisseurs and interested individuals, restaurateurs, traders, winegrowers, breeders and journalists. The first edition of March this year was one of the highlights in President Roland Lenz's activity report for the first half of the year. The meeting was characterized by many votes from the members who participate with commitment in the association.

After the official part, the attendees were able to taste and discuss over 40 different pure PIWI wines. These include various new varieties that only have breeding names, such as VB CAL 1-28 or VB CAL 32-7.

Media contact:

President Roland Lenz
Organic winery Roland and Karin Lenz, Iselisberg, Uesslingen

info@weingut-lenz.ch / +41 52 746 13 86

Daniel Schwarz

Homepage: https://piwi-international.de/piwi-regional/schweiz/

Board PIWI CH at the general meeting

July 6, 2020|

General Meeting June 30, 2020 - Program

The first general meeting of PIWI CH will take place on June 30, 2020 at the organic wine estate Roland and Karin Lenz in Uesslingen (TG).

Are planned:

13.30: Biodiversity and new varieties (public event)

4:00 pm: Start of the general assembly

Finally: snack and wine tasting on the subject of new varieties

The agenda of the meeting is:

  1. Greeting
  2. Choice of 1 vote counter
  3. Activity report of the President
  4. Annual program and activities
  5. Budget 2020: Membership fee budget 2020
  6. Elections: Board of Directors, Auditors, President
  7. Miscellaneous and discussion

Registration requested at:

Organic winery Roland and Karin Lenz
0041 52 746 13 86

June 12, 2020|

First general meeting PIWI CH

Actually, our first general meeting should take place on March 30, 2020. But first things turn out differently and secondly than you think ... Who could have imagined a month ago how our situation is at the moment?

We have postponed the meeting to Tuesday, June 30, 2020 and hope that until then something “normal” will have returned to our everyday life.

Invitation (PDF)

We look forward to seeing you. Either at the afternoon event on the topic of biodiversity or then at the meeting with a subsequent tasting of PIWI wines ...

March 15, 2020|

PIWIs in Swiss viticulture

Mushroom-resistant grape varieties (piwis) are particularly suitable for sustainable viniculture from both an ecological and an economic point of view. Compared to European vines, crop protection treatments can be saved and environmental pollution reduced. The industry's interest in Piwi wines, especially in the organic sector, is increasing - even if the traditional wine sector is changing only slowly.

Lena Holzwarth, University of Agricultural. Forest and Food Sciences (HAFL), Zollikofen, and Andreas Häseli, Research Institute for Organic Agriculture (FiBL) Frick

Read the article (PDF, 0.8 MB)

Article published in the Swiss magazine for fruit and wine growing 4/2018

Reasons PIWI cultivation Switzerland
March 20, 2018|
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