Our Partners

Farmers & Landowners

We supply and spread crushed silicate rock, such as basalt, on local agricultural land. Discover how we partner with farmers and landowners to enrich soil health and combat climate change.

The Benefits of Enhanced Rock Weathering

Crushed basalt is applied to farmland due to its benefits for soil fertility, soil biology, crop yield and health. This mineral-rich volcanic rock also removes carbon dioxide from the atmosphere through a process called enhanced rock weathering.

Meet the team and experience UNDO’s operations in this short video

Hear first-hand from organic farmers Murray Cooper and Hugh Grierson about the positive impact of crushed basalt on the soil health, crop yield and biodiversity of their farms. Plus, take a deeper dive into the agronomic benefits of enhanced rock weathering from UNDO’s field trials. 

Certified By

Our basalt is suitable for all crops, including pasture, and has been approved for use in organic farming systems by respected certification bodies.

Basalt: A Nutrient-Rich Soil Enhancer

After basalt is spread on farmland, it breaks down to release essential nutrients, promoting healthy crop growth and stabilising soil pH. It’s a win-win for your land and the environment.

The Nutrient Composition of Basalt


Important for protein synthesis, root and shoot development and energy transfer within the plant.


Aids the process of photosynthesis and improves root growth to help crops become more drought-resistant.


A vital component of chlorophyll synthesis and central to the plant developing healthy, green leaves.


Strengthens plant cell walls, making crops more resistant to mechanical damage, pest attacks and disease.


A key nutrient for crop growth affecting the formation of chlorophyll, protein production and synthesis of oils.


Essential for chlorophyll synthesis and a central component of enzymes responsible for the reduction of molecular oxygen. 


Supports crop growth, enzyme function and the transport of oxygen throughout the roots and leaves.


Vital to a wide range of enzyme processes including hormone synthesis, with a key role in photosynthesis.


Helps nitrogen assimilation and is important for potassium absorption.


Plays a vital role in many functions within the plant including protein synthesis and maintaining cell wall integrity.

The Alkalising Effect of Basalt Rock

As basalt weathers, it helps manage and maintain the target pH of the soil, reducing the need to lime as frequently. Unlike lime, which offers an immediate but temporary adjustment, basalt delivers a slow release of alkalinity to stabilise soil pH at optimum levels for longer. It also increases the availability of essential nutrients, enhancing soil health over time.

Boosting Local Economies

Our Green Jobs Pathway brings green jobs to rural communities increasingly feeling the negative impacts of climate change. We share free soil analysis before and after spreading. We’re not importing machines and talent. We’re importing the ability for local people to do carbon removal in their community.

Climate Action for Every Type of Farm

Our basalt is suitable for every kind of farm – arable, dairy, beef, sheep and mixed. The University of Sheffield claims that “adding rock dust to UK agricultural soils could absorb up to 45% of the atmospheric carbon dioxide needed to reach net-zero…[it] could remove between 6-30 million tonnes of CO2 from the atmosphere annually by 2050.”

Our Field Trials

From small plot field trials to expansive research at Newcastle University’s Nafferton Farm, we’re building a robust dataset to quantify the agronomic benefits of enhanced rock weathering.

We’re studying eight different crops, from cereals and oilseeds to potatoes and grassland, across hundreds of plots as we gather thousands of soil and tissue samples.