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" />Farmers & Landowners
We supply and spread crushed silicate rock, such as wollastonite, on agricultural land. Discover how we partner with farmers and landowners to enrich soil health and combat climate change.
The Benefits of Enhanced Rock Weathering
Silicate rock improves soil pH, soil structure, nutrient availability, and plant resilience by releasing essential minerals. As they weather, they provide lasting agronomic benefits.
Stronger Soil, Resilient Crops, Fewer Inputs
Farmers are choosing silicate rock for its ability to stabilise soil pH, improve nutrient availability, and enhance crop resilience. It provides calcium, silicon, magnesium, and potassium, which help strengthen plants, improve drought resistance, and reduce reliance on synthetic inputs.
A Proven Solution Backed by Science
Enhanced rock weathering (ERW) is a proven process that improves soil health while capturing CO2 from the atmosphere. Field trials across multiple regions have shown that silicate rock can increase crop yields, reduce input costs, and enhance natural carbon removal.
Expanding Our Impact
UNDO works with farmers to bring the benefits of silicate rock to agricultural land through a dedicated program. Eligible farms are selected based on location, soil type, and spreading logistics. With operations in Canada and beyond, we’re increasingly expanding access to farmers who want to improve soil health while contributing to carbon removal efforts.
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.
The Benefits of Silicate Rock for Your Farm
Explore the benefits of silicate rock for soil health, crop resilience, and long-term farm productivity.
Better Soil, Less Lime
Both basalt and wollastonite offer a longer-lasting alternative to lime, helping farmers raise and maintain soil pH with fewer applications. By gradually releasing alkalinity, silicate rocks keep soil conditions optimal for longer, reducing lime input costs.
Strengthens Crops & Boosts Yield
Applying silicate rock to farmland delivers essential nutrients, which contribute to overall plant health. These minerals improve root growth, making crops more resilient to drought and stress while enhancing the effectiveness of fertilisers. Over time, farmers see stronger crops with better nutrient uptake and higher yields.
Natural Pest & Disease Resistance
Silicon plays a crucial role in plant defence, strengthening cell walls and improving resistance to pests and diseases. Field trials have shown that silicate rock applications can slow the spread of fungal diseases, such as powdery mildew, reducing the need for chemical treatments.
Essential Nutrients in Silicate Rock
Silicate rocks, like wollastonite and basalt, provide essential macro and micronutrients that support soil fertility, improve plant resilience, and enhance crop productivity.
Calcium
Essential for strengthening plant cell walls, making crops more resistant to disease and environmental stress. It’s crucial for root development, improving nutrient uptake.
Silicon
Known as the “resilience nutrient,” silicon helps plants withstand drought, pests, and diseases. It also enhances nutrient uptake efficiency, making fertilisers more effective.
Magnesium
A key component of chlorophyll, magnesium, supports photosynthesis, energy transfer, and healthy leaf development, maintaining overall crop health.
Potassium
Supports root growth and improves drought resistance. Potassium plays a critical role in plant water regulation and stress tolerance.
Sulphur
A vital component of plant proteins, promoting the formation of essential amino acids to support plant growth; it’s also involved in photosynthesis.
Getting Silicate Rock on Your Farm
We work directly with farmers as partners, not as customers. Unlike a traditional input supplier, UNDO doesn’t sell rock by the bag. Instead, our program members get access to soil testing, spreading, and ongoing monitoring of their agronomic benefits while UNDO manages the carbon removal process in the background.
To ensure sustainability, our operations focus on local farms surrounding our rock source sites; for example, in Ontario, Canada, we work within a 150km radius of our partners, Canadian Wollastonite. Keeping transport routes short helps reduce the carbon footprint of our work. If you’re unsure whether your farm is eligible, our team can help assess your location and logistics.
We’ll take soil samples before and after spreading and will share these results with you, giving you insights into the long-term impact on your land and crops. We are partnering with farmers who have moderately acidic to neutral soils to maximise the benefits for farmers and carbon removal for our planet.
The amount of silicate rock spread depends on the type of rock used and the location of the land. For example, wollastonite is applied at 2–4 tonnes per acre using a standard lime spreader. We spread before or after harvest to ensure whole, healthy, and intact crops.
Our rock is supplied and spread free of charge. Any associated costs vary by region and rock type, but we always aim to make silicate rock as accessible as possible for the communities in which we operate. In Canada, for example, wollastonite is provided at no cost to farmers – the only expense is trucking. In many cases, trucking is subsidised as part of our program. Other regions may have different structures, but our goal is to keep costs low for farmers while delivering long-term soil benefits.
Farmers Leading the Way to a Healthier Planet
ERW has the potential to lock away up to 4 billion tonnes of CO2 per year – 40% of global targets. Proven in lab and field experiments at universities around the world, ERW makes agriculture part of the solution to climate change.
Join Our Farmer Program
Farmers are turning to silicate rock, like wollastonite and basalt, to optimise their land and cut costs. Our program makes it easy – providing free spreading, soil testing, and often subsidised haulage so you get the most out of every application.
With a simple, hassle-free process, you can improve soil structure, enhance nutrient availability, and reduce reliance on synthetic inputs.
Check if your farm is eligible today.
“I’ve been applying wollastonite for 8 years, and my fields keep getting better. I get less lodging, and my crops grade higher. Yields are up overall, and the crops seem to handle the weather extremes better. From sod to corn I use wollastonite on a wide variety of crops. Signing up for the carbon project was straightforward. The fact that wollastonite captures carbon is a nice bonus for the planet.”
"For farmers, the benefits of UNDO’s work are clear: spreading crushed basalt on our fields is good for the soil quality and good for the livestock that grazes here, which is what every farmer wants. It also means that less costly products are needed to maintain the health and pH of our soil. It’s easy to do as UNDO organise the spreading for us, and we’re already reaping the rewards."
“We apply wollastonite to our vegetable fields as a carbon-negative source of lime and we have seen consistent increases in quality, shelf life, and drought resistance.”
"Sebastian Farms is a certified organic vineyard in the Okanagan Valley in British Columbia. Wollastonite helps with our vine nutrition and provides nutrients to “toughen” the plants up and make them less vulnerable to pests and disease and some of the extreme environmental conditions we face. We are trying to reduce our carbon footprint every year, but it's the benefits we see in the vineyard that keep us coming back to Canadian Wollastonite. It’s a great product that helps our vines, soils and environment."
Frequently Asked Questions
Lime provides a quick pH adjustment, but its effects wear off quickly, requiring frequent applications. Silicate rock raises and stabilises pH for longer while also releasing key nutrients like calcium, magnesium, and silicon, improving soil health over time.
Silicate rock is most effective in moderately acidic to neutral soils but can provide benefits in a range of conditions. A soil test can help determine how it will work best for your farm.
A wide range of crops, including pasture, see improvements in root strength, nutrient uptake, and resilience to stress. The benefits vary depending on soil conditions and crop type.
Our silicate rock is supplied and spread free of charge. Occasionally, we may ask for a contribution to the associated costs depending on location and logistics. In Canada, for example, farmers only cover haulage. Other regions may have different pricing structures, but we always keep costs lower than traditional soil amendments.
Some benefits, like improved soil structure and pH stabilisation, begin within the first season. Others, such as increased crop resilience and long-term nutrient release, continue developing over multiple growing cycles.
It is spread using standard lime-spreading equipment, making it easy to integrate into existing farm operations. Application rates vary by region and rock type—our team will provide guidance based on your soil needs.
The program is funded by the sale of carbon removal credits. By spreading wollastonite on farmland, we capture and store CO2 from the atmosphere. Our farmers enjoy the soil and crop benefits, while the carbon credits are sold on the voluntary market to fund and scale this initiative.
Beyond Carbon: Environmental Benefits of Enhanced Rock Weathering
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