Potatoes
Potatoes & tubersOur largest crop. We grow waxy and floury varieties – from Ditta and Amandine to Agria and Jelly – and keep them in our own cold store well into spring.
- Harvest
- July – October
- From store
- November – June
Organic growing
Bud-certified production across around 110 hectares.
Rooted in Thurgau
Family-run in Neuwilen, in the region for generations.
Modern technology
Precise machinery and robotics in organic growing.
Our own cold store
Room for 2’800 crates – storage vegetables into spring.
Storage vegetables from Thurgau –
from our own fields.
Potatoes, carrots, onions and beetroot form the core. Celeriac, garlic, legumes and watermelons complete the range.
See all cropsCrops
What we grow
From the potato to the watermelon
Our focus is on storage vegetables. What is harvested in summer and autumn stays with us through the winter, from our own cold store.
Carrots
Root vegetablesOne of our main storage crops. Fresh from the field in summer and autumn, from the cold store all winter long.
- Harvest
- July – November
- From store
- December – May
Onions
AlliumsGrown in several varieties and carefully dried after harvest. Well-cured onions see us through the entire winter.
- Harvest
- August – September
- From store
- October – April
Beetroot
Root vegetablesRobust in the field and exceptionally well suited to storage. Beetroot is a classic storage crop and fits our rotation well.
- Harvest
- July – October
- From store
- November – April
Watermelons
Fruiting vegetablesSwiss organic watermelons from Thurgau – a crop that needs a warm summer. Part of the harvest is sold directly.
- Harvest
- July – September
Cultivation
Modern organic growing
Skill and technology together
Organic growing demands precision: what grows without herbicides has to be tended mechanically. Modern machinery and an autonomous laser weeding robot make that work possible – the decisions are still made by those who know the field.
How we grow
Wide crop rotation
Vegetables, cereals and ley grass take turns. That keeps the soil healthy and breaks disease cycles.
Soil care
Organic matter and gentle cultivation preserve the soil structure and its capacity to hold water.
Precise machinery
Modern machines work more accurately, ease the physical load and are kinder to the crop.
Weeding without herbicides
Mechanically, by hand – and now with an autonomous laser weeding robot.
Storage and energy
Room for 2’800 crates of organic vegetables
Our cold store holds organic vegetables from our own fields and from the region for months on end. On the roof, 900 m² of photovoltaics generate around 70 per cent of the electricity the cooling requires.
- Cold store for around 2’800 large crates
- Also for organic vegetables from the region
- An unbroken cold chain from harvest onwards
- 900 m² of photovoltaics on the hall roof
The farm
Family-run, professionally organised
Urs and Roman Dünner
Dünner BIO AG is run by father and son. Six full-time staff and up to 35 seasonal workers bring in the harvest – a family business in its leadership and a production business in its scale.
Image placeholder · Urs and Roman Dünner at the farm
Facts and figures
The farm at a glance
Area, team, storage capacity and our own electricity production.
- Area farmed
- 110ha
- Full-time staff
- 6
- Seasonal staff
- up to35
- Crates of storage capacity
- 2’800
- Photovoltaic system
- 900m²
- Cooling electricity self-supplied
- approx.70%
«Regionally rooted. Naturally grown.»
News
Press
What is written about us
Articles from the media, trade publications and the farm.
Mitteilung der Dünner BIO AGBrand auf unserem Betrieb in Neuwilen
Ein Brand auf unserem Betriebsareal in Neuwilen hat uns und unsere Mitarbeitenden vor eine aussergewöhnliche Situation gestellt.
Mitteilung der Dünner BIO AGWasser nachhaltig nutzen – Investition in die Zukunft
Wasser ist eine unserer wichtigsten Ressourcen. Gerade im Gemüsebau ist eine zuverlässige Wasserversorgung entscheidend, um unsere Kulturen auch während längerer Trockenperioden ausreichend versorgen zu können.
- Mitteilung der Dünner BIO AG
Gemeinsam neue Wege – Zusammenarbeit mit Agroservice Häberli AG
Seit 2026 gehen die Dünner BIO AG und die Agroservice Häberli AG gemeinsam neue Wege. Mit der Zusammenarbeit bündeln wir unsere Stärken und schaffen gleichzeitig die Grundlage dafür, dass sich beide Unternehmen gezielt auf ihre Kernkompetenzen konzentrieren können.
Jobs
Work in the field and in the store
In season, up to 35 people join our team. If you can lend a hand and like working outdoors, you are in the right place.
Machine operator, agriculture
Permanent position · 80 – 100 % · Neuwilen, Thurgau
You drive our tractors and carry out the machine work across the whole season – from soil cultivation in spring to the harvest in autumn. We are looking for a motivated tractor driver.
Administrative clerk
Permanent position · 50 – 100 % · Neuwilen, Thurgau
You keep the office side of the business running: correspondence, master data and support for the management. The workload is 50 % or by arrangement.
Speculative application
Nothing suitable? We would be glad to receive your speculative application at kontakt@bioduenner.ch.
An enquiry about our organic vegetables?
We look forward to hearing from you
Whether about quantities, storage or working together – write to us or visit us in Neuwilen.
- Sattlerstrasse 7, 8566 Neuwilen
- +41 79 866 67 64
- kontakt@bioduenner.ch