While NPK provides the “big three” nutrients for growth, Polysulphate acts as the perfect partner to complete the nutritional profile.

• ​Extended Release: It dissolves slowly, providing a steady “supplementary” feed over several weeks rather than a sudden burst that washes away.

​Low Chloride: It is very safe for sensitive plants (like many tropical ornamentals) that can be “burned” by cheaper high-chloride fertilizers.