Change starts with soil.
We help you restore the soil microbiome and nutrient cycles in your soils, for resilient soils that produce healthy food with fewer inputs and are more resistant to external influences.
Our Solutions
We bridge the gap between fieldwork and microbiology.
New Models
Hiwassee Extractors
Hiwassee Compost Extractors get the best out of good compost and enable the efficient production of compost extract in large quantities. Easily and effortlessly bring valuable microbiology to the field – exactly when you need it and for any farm size.
Compost Workshop
We produce high-quality, microbiologically complete compost substrates that are rich in bacteria, fungi, nematodes, and protozoa. This diverse microbiology, in the form of compost extract, forms the basis for the regeneration of the soil microbiome.
Fieldwork and Research
Our origin lies in regenerative contract work, which we combine with practical research. Whether it’s application methods, equipment, tillage, or microbiology: together with our partners, we want to better understand soil microbiology and make it usable for you.
Field Experiences
We are on eye level with farmers.
“Despite challenging soils, I managed to increase the humus content from 3.8 to 5.7% in just six years. For four years, I have consistently applied compost extract during sowing. This vital microbiology has massively accelerated humus build-up.”
Bruno Feierabend, Farmer in Inwil
“At some point, the synthetic agents and additives became too much for us. Thanks to ERDIG, our soils are now vital and in balance. Due to the re-established microbiology, our soils have better nutrient availability and hardly any pressure from pioneer plants. A partnership that brings real change!”
Alexandra Widmer and Andrea Willi, Biohof Lügisingen
“The soil is the stomach of the plant – that is an important step towards understanding! From there come nutrient and water uptake, plant health, vital substance content, and humus – the fertile trace of soil life. The soil is where plants and the microbiome meet, which is why nurturing soil life is of central interest. We do this with compost extract and observe that the soil becomes softer, the roots of crops stronger, and less weeds grow. Later, you see plant health – all by itself!”
Dietmar Näser, Agronomist, Grüne Brücke
This is the second year that I have been using compost extract in my small vineyard. Last year, I tested the effects on four different plots, focusing on vine growth, grape yield, and the accumulation of reserves in the wood. This year, we have expanded the use of compost extract to the entire vineyard. To increase our efficiency, we purchased the Hiwassee X350e Extractor. This machine provides us with better extraction results and is very easy to operate and clean. I recommend the X350e without hesitation.
Damien Laureau, Winemaker, Domaine Laureau
This is ERDIG
We stand for living soils.
We offer you new solutions for sustainable, self-determined agriculture.
We encourage new ways of thinking
Instead of spraying plants and crops healthy, we must care for our soils, build humus, and nourish the microbiome.
From compost to the field
Together with partners, we research compost substrates, application methods, and machinery.
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Countries reached
Since April 2026, we have been shipping Hiwassee Compost Extractors from Germany across Europe.
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Farms trust our regenerative contract work.