Potassium sulfate (K₂SO₄) is a water-soluble white crystalline salt used primarily for fertilizer production. It is the most popular low-chlorine fertilizer in the world. This fertilizer because enhances color, flavor, sugar and vitamin C in citrus fruits like pistachios, almonds, hazelnuts and other orchards. The solupotasse compounds consist of 51-52% potassium, 18-18-5% sulfur, <0.5% chlorine and < 1% sodium and manufactured with advanced technology because it is converted to solupotasse in two stages therefore, it has a greater solubility and less impurity. Potassium sulfate has a solubility of less than 50 g/L, while commercially available one has a solubility of 80 g/L. The advantage of solupotasse made by the Green Hills brand, that have a solubility between 108 and 150 grams per liter an  suitable for leaf spraying and hydroponics cultivate.

This is a major source of S and plants need it for protein synthesis and enzymatic activity. This material is produced as pellets of various sizes, but the Green Hills solupotasse powder is less than 0.015 mm. This size has the benefit of a high dissolving power for foliage spray or irrigation, which uses less water and is more cost-effective. Heavy irrigation is required for the plants to increase their potassium levels duing and after foliage application so that the plant can raise its potassium content with the aid of water. It is economical and ideal to use solupotasse as a hole manure during flowering and fruiting. The best place to put the fertilizer into the soil is 15 inches below the seed and 3 inches across. The field soil must first be analyzed, then the consumption instructions are given to the farmer. Vegetables like tomatoes, spinach, lettuce, and celery need a lot of potassium sulfate. Without them, their performance and quality will be greatly reduced

For trees: In winter (February, March) depending on the climate, apply 150-250 kg/ha.Improving the quality of taste and fruit size depending on the type of tree but usually applied 45 days before harvest, spraying or irrigation should be carried out.In low-potassium soils, 300 to 400 kg of solupotasse per hectare should be used

For greenhouses: Due to the sensitivity of the products, use 1.5 kg per hectare every 15 days (to thicken the fruit)

For summer: Use 2 kg per 1000 liters of water every 15 to 20 days during foliar irrigation

For seeds: Apply 150-250 kg per hectare of granulated or powdered solupotasse, mixed it with the soil and then spraying is done.Vegetables like tomatoes, spinach, lettuce, and celery need a lot of potassium sulfate. Without them, their performance and quality will be greatly reduced.