Oscorna Dünger
German manufacturer of organic fertilizers and soil improvers, owner of Germany's only horn mill, market leader in organic mixed fertilizers for hobby gardeners.
Last updated September 29, 2026
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Overview
Oscorna Dünger GmbH & Co. KG is a German fertilizer manufacturer based in Ulm, best known for its organic mixed fertilizers and soil improvers for hobby gardeners. The company traces its origins to 1935, when a master miller from an insolvent horn-button factory founded a sideline business. From 1945 it specialized in processing near-natural plant and animal raw materials, particularly horn-based fertilizer. The company initially operated as "Corna-Werk Gebr. Wölper GmbH & Co." under the leadership of newly joined partner Robert Schulmeister (d. 1991). In 1952 the artificial word "Oscorna" was registered as a trademark and the company was renamed. Oscorna is notable for owning Germany's only horn mill. The horn material used today is mainly imported from Eastern Europe for further processing, since manual de-coring of horns would be unaffordable in Germany. Oscorna also purchases externally ground horn to blend into its own fertilizer mixtures, though coarse horn grit is still ground in-house. The company has around 100 permanent employees and is the German market leader in organic mixed fertilizers (natural fertilizers) for hobby gardening. Oscorna's product philosophy centers on working hand in hand with nature: the company cares not only for plant nutrition but above all for soil health, vitality and fertility. Its product range covers soil improvement, compost, planting, fruit and vegetables, flowers and perennials, roses, lawns and woody plants. The company offers seminars and free consultation to gardeners. For its environmental achievements, Oscorna received the City of Ulm Environmental Prize in 1997, an "Recognition for Companies in Industry" from the Baden-Württemberg Ministry of the Environment in 1998, and in 2005 its entire product range received the Austrian Environmental Label. In 2006 Oscorna Animalin was rated "very good" by Öko-Test magazine. Horst Mayer, managing partner from 1977, was succeeded in 2008 by Thomas Mayer.
History
Oscorna Dünger GmbH & Co. KG, based in Ulm, Germany, is a fertilizer-producing company that owns Germany's only horn mill. It was founded in 1935 by a master miller from an insolvent horn-button factory as a sideline business. From 1945 the company specialized in processing near-natural plant and animal raw materials, particularly the production of horn fertilizer. Initially the company operated as "Corna-Werk Gebr. Wölper GmbH & Co." under the leadership of newly joined partner Robert Schulmeister (d. 1991; the Ulm Waldorf kindergarten is named after him today). In 1952 the artificial word "Oscorna" was registered as a trademark and the company was renamed. The horn material used today is mainly imported from Eastern Europe for further processing, since manual de-coring of horns would be unaffordable in Germany. Oscorna also purchases externally ground horn to further process it into fertilizer mixtures with its own products. However, coarse horn grit is still ground in-house. The company has around 100 permanent employees and is the German market leader in organic mixed fertilizers (natural fertilizers) for hobby gardening. For special achievements in environmental protection, the company was awarded the City of Ulm Environmental Prize in 1997, received an "Recognition for Companies in Industry" from the Baden-Württemberg Ministry of the Environment in 1998, and in 2005 its entire product range received the "Austrian Environmental Label". In 2006 Oscorna Animalin was rated "very good" by Öko-Test magazine. A quote from Horst Mayer, managing partner from 1977, reflects the company's philosophy: "In 1950 we could also have asked ourselves with which products we could achieve high sales fastest and earn the most money. Out of responsibility, the decision was made that we only want to produce products that harm neither humans nor animals nor plants nor soil in any form. … In the eyes of our competitors we were miserable merchants, as we renounced millions in sales and profit for years." The successor to the deceased company leader Horst Mayer is Thomas Mayer since 2008.
- 2008
Thomas Mayer succeeds Horst Mayer as managing partner.
- 2006
Oscorna Animalin rated "very good" by Öko-Test magazine.
- 2005
Entire product range received the "Austrian Environmental Label".
- 1998
Received "Recognition for Companies in Industry" from the Baden-Württemberg Ministry of the Environment.
- 1997
Awarded the City of Ulm Environmental Prize.
- 1977
Horst Mayer becomes managing partner.
- 1952
The artificial word "Oscorna" registered as a trademark; company renamed.
- 1945
Specialized in processing near-natural plant and animal raw materials, particularly horn fertilizer.
- 1935
Founded by a master miller from an insolvent horn-button factory as a sideline business.
Products and positioning
Natural, organic fertilizers and soil improvers for environmentally conscious hobby gardeners; market leader in organic mixed fertilizers in Germany.
Oscorna Animalin
Organic fertilizer rated "very good" by Öko-Test in 2006.
Oscorna Bodenverbesserer
Soil improver for healthy garden soil.
Oscorna organic mixed fertilizers
Range of natural fertilizers for hobby gardening.
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