Fertilizers

K2O fertilizer means potash, the fertilizer that supplies potassium. Its price follows the world market for potassium chloride (MOP). The World Bank benchmark for granular MOP averaged $367.50 per tonne in September 2026, up from an average of $347.50 in 2025. Sulphate of potash (SOP) usually costs more, because it is chloride-free and carries sulphur.

Potash and potassium are not the same thing, but they are closely linked. Potassium (K) is the nutrient plants need. Potash is the fertilizer that delivers it. When people say “potash”, they almost always mean a potassium fertilizer such as MOP or SOP. The mix-up is understandable. Farmers, shops and suppliers use potash, potassium, MOP,

MOP fertilizer is muriate of potash, the most widely used potassium fertilizer in the world. Chemically it is potassium chloride (KCl), and it carries about 60% potassium, shown as K2O. That gives it an NPK grade of 0-0-60. Ask a farmer, a trader or a fertilizer importer what they use for potassium and most will

Potash is a potassium fertilizer. The name covers mined and manufactured salts that contain potassium in a water-soluble form, and in farming it usually means potassium chloride (KCl), known as muriate of potash (MOP). Potassium is the “K” in NPK, one of the three main plant nutrients alongside nitrogen and phosphorus. The word comes from

Potash fertilizer supplies potassium, the “K” in NPK. Agromer supplies potash to importers, distributors and large agricultural buyers, mainly as MOP (muriate of potash, about 60% K2O) and SOP (sulphate of potash, about 50% K2O). This page covers the grades we handle, what drives the price, and what to send us for an offer. For