Diamond Fertilisers partners with POLY4 to deliver sustainable farming nutrition to UK farmers. 

Thomas Bell are proud to announce a new partnership with AngloAmerican’s Crop Nutrients business. 

This partnership brings together POLY4’s innovative crop nutrition solution with Diamond Fertilisers’ established network and strong connections with UK growers. Together, they will bring a premium fertiliser to market that not only enhances crop performance but also supports long-term soil health and environmental stewardship.

“Where POLY4 brings the science, Diamond Fertilisers brings the power to deliver it”, said Alison Schofield, Marketing Manager at Thomas Bell.“This partnership ensures UK farmers have access to a proven fertiliser that drives consistent yields, improved nutrient efficiency, is suitable for chloride-sensitive crops and supports sustainable farming practices.” 

POLY4 is derived from the natural mineral polyhalite and delivers four essential nutrients — potassium, sulphur, magnesium, and calcium— in a single low chloride product. Unlike many alternatives, POLY4’s granular form ensures superior strength and flow ability, making it more compatible with modern spreading equipment and reducing dust in handling. Its uniform nutrient composition and optimised release profile provides a steady, season-long supply of nutrition, delivering nutrients where and when crops need them most. 

Scott Yarwood, Area Manager UK/Ireland for Anglo American Crop Nutrients said: “We are incredibly proud to partner with Thomas Bell. Our POLY4 product is ideal for UK farmers and Diamond Fertilisers’ commitment to quality and service makes them an ideal partner to help us expand POLY4’s reach and impact across the UK farming community”.

What sets POLY4 apart? 

• Four nutrients in one: Delivers plant available potassium,sulphur, magnesium, and calcium in a single, naturally balanced product.

•10 years of trial data show a 3-5% yield enhancement with POLY4.

• Granular strength: Robust uniform granules for improved spreading accuracy, predictable performance and ease of handling.

• Low in chloride: Ideal for sensitive crops and long-term soil health.

• Optimised release: Provides a sustained nutrient supply throughout the growing season.

• Low carbon footprint: Naturally occurring and minimally processed for a more sustainable farming future.

‍About POLY4 

POLY4 is a multi-nutrient fertiliser produced from the natural mineral polyhalite. It supports balanced crop nutrition and sustainable farming practices and is distributed globally by Anglo American, one of the world’s leading mining companies, committed to delivering innovative, sustainable solutions for the future of agriculture.

About Diamond Fertilisers

 Diamond Fertilisers, a brand of fertilisers from Thomas Bell& Sons Ltd - a leading UK independently owned fertiliser importer, supplier and manufacturer. Known for quality, reliability, and service, Diamond Fertilisers delivers tailored crop nutrition solutions to farmers nationwide.

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