One of the main benefits of using polyhalite in turf management is its slow-release properties. When applied to soil, polyhalite gradually breaks down over time, releasing nutrients slowly and steadily. This means that the nutrients are available to plants for a longer period of time, reducing the need for frequent reapplication and ensuring a sustained source of nutrients for healthy plant growth.
The mineral polyhalite was formed more than 200 million years ago, and can be found over 1,200 metres below the Earth’s surface, in the bedrock under the North Sea along England’s north-eastern coast. This natural fertiliser is produced exclusively by the Boulby mine in North Yorkshire, England. The Boulby mine is the first and only Polyhalite mine, making ICL the sole producer in the world
Polyhalite is a natural mineral that is used as a fertiliser in turf management because of its unique composition of essential plant nutrients and its slow-release properties. Polyhalite contains four essential nutrients for plant growth: potassium (K), sulphur (S), magnesium (Mg), and calcium (Ca). These nutrients are all important for plant growth and development, and are typically found in different fertilisers. However, polyhalite provides them in a balanced and readily available form, making it a popular choice among turf managers.
One of the main benefits of using polyhalite in turf management is its slow-release properties. When applied to soil, polyhalite gradually breaks down over time, releasing nutrients slowly and steadily. This means that the nutrients are available to plants for a longer period of time, reducing the need for frequent reapplication and ensuring a sustained source of nutrients for healthy plant growth.

ICL’s Boulby Mine
Another advantage of polyhalite is its ability to improve soil structure and health. The high sulphur content in polyhalite can help to lower soil pH, making nutrients more available to plants and improving soil structure. Additionally, the magnesium and calcium in polyhalite can help to improve soil texture and increase water-holding capacity, which can reduce the need for irrigation.
Polyhalite is also an environmentally sustainable option for turf management. Its slow-release properties mean that it reduces the risk of leaching and runoff, which can lead to water pollution and other environmental problems. Additionally, because polyhalite contains a balanced mix of nutrients, it reduces the need for multiple types of fertilisers, which can also help to reduce environmental impacts.
In summary, polyhalite is a popular choice for turf managers because of its balanced composition of essential plant nutrients, slow-release properties, ability to improve soil health, and environmental sustainability. By providing a steady source of nutrients to turfgrass, polyhalite can promote healthy growth and help to maintain a vibrant and sustainable turf surface.
7 Brands found

High quality organo-mineral fertilisers designed for all types of turf
Gronamic is a range of organo-mineral fertilisers from ICL. Each granule combines mineral and organic nutrient sources. The granulation process produces consistent, uniform and dust-free products. This range allows you to incorporate all the benefits of organic sources of nutrition into your fertiliser programme without compromising on quality or reliability.
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High impact granular fertiliser range for tees, surrounds, fairways, sports fields and lawns
ProTurf contains a combination of Poly-S controlled release fertiliser technology, readily available urea nitrogen and polyhalite, a unique multi-nutrient compound fertiliser. The controlled release Poly-S technology leads to consistent, regular growth over a 2-3 month period without growth peaks. The uncoated nitrogen allows an immediate response of the turf, even in cooler conditions. The multi-nutrient compound fertilser component contains four macro-nutrients (K, MgO, CaO & S) all in one granule.
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Controlled release, granular formulation
Different nutrient inputs or release characteristics can be achieved depending on your requirements including quick response or slower, steadier release patterns based on the analysis selected. The mineral polyhalite is a component part of the Sierrablen Mini range. Polyhalite is a naturally occurring mineral fertiliser containing potassium, magnesium and calcium. We have found that the addition of polyhalite into our fertilisers results in improved turf colour, turf quality, turf vigour and growth rates. Sierrablen Mini fertilisers contain over 60%+ controlled release N in the form of our Poly-S technology. The Poly-S in Sierrablen Mini is a controlled-release nitrogen source that delivers nitrogen gradually and consistently over a 4 – 5 month period. The nutrient release is primed by moisture permeating through the outer polymer channels, through micro-channels in the sulphur layer and into the nutrient core where the urea is solubilised. Once the urea is solubilised it is released and made available for plant uptake. This means that the fertiliser is released at an optimum rate for plant uptake and the risk of leaching losses is minimised.
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Premium quality controlled release mini-granular fertilisers
The Sierrablen Plus range of turf fertilisers contains Poly-S and resin coated PACE technology with conventional nitrogen sources to provide the best long-term nutrient release patterns.
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With Pearl - Improved rooting with recycled phosphorus
Pearl Technology blends a unique, recycles, slow release phosphorus into our premium controlled release fertilisers. Providing significantly increased rooting and more efficient nutrient use over traditional phosphorus sources.
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High performance long-lasting micro-granular fertilisers for high quality fine turf
Sierraform GT is a high performance range, designed for use on fine turf throughout the year. Each granule contains conventional and slow release technology to provide a consistent and sustained release pattern. The slow release nitrogen and potassium sources bring real benefits for root development and stress tolerance. The micro granules are formulated to allow even distribution at low rates of application.
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Combination of controlled release and conventional technologies for a consistent growth response
The Sportsmaster CRF Mini range contains a combination of both controlled release and conventional fertiliser technologies. This provides a quick response with consistent turf growth for up to three months. The range comprises five different nutritional analyses to support several N-P-K ratios. This supports turf health throughout the year in various situations. The range is formulated to spread evenly and disperse quickly, providing the ideal turf response.
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