Ammonium sulfate

Granular chemical-grade ammonium sulfate ((NH₄)₂SO₄) is a high-purity nitrogen-sulfur fertilizer produced through controlled chemical synthesis. It contains 21% nitrogen (ammonium form) and 24% sulfur (sulfate form). This fertilizer stands out for its exceptional purity, stable composition, and absence of heavy metals, making it suitable even for greenhouse use and complex fertilizer blends.

Recommended use:

• all agricultural crops: grains, legumes, oilseeds, vegetables, fodder;
• especially effective for crops with a high need for sulfur: rapeseed, soybeans, mustard, garlic, onions;
• main, pre-sowing, post-sowing, row application;
• also suitable for hydroponics, greenhouses, and water-soluble fertilizers.

Advantages:

• high chemical purity – suitable even for sensitive crops;
• stable composition, which guarantees predictable action;
• nitrogen + sulfur in one granule — double action for growth and quality;
• does not caking, has high granule strength;
• increases the content of proteins, gluten, and oil in the crop;
• universal for open ground and greenhouses.

Limitations and warnings:

• do not store near acids, alkaline substances, or organic fertilizers;
• do not mix with lime or calcium fertilizers without a compatibility test;
• do not allow moisture to build up — caking is possible.

Appearance and color: free-form granules from white to dark brown

• store in dry, well-ventilated facilities, protected from direct sunlight, with relative air humidity not exceeding 70%. Place bags on pallets at least 15 cm above the floor, arranged in a single layer;
• packaging (bags, big bags) must be tightly sealed to prevent moisture ingress;
• permissible storage temperature: from –20 °C to +35 °C (avoid exposure to high humidity, as this may cause caking or condensation — loosen before use if necessary);
• avoid contact with acids, alkaline substances, organic compounds, or other fertilizers that may cause a chemical reaction;
• in case of prolonged storage, periodically loosen the product to prevent clumping.

Storage guarantee period: 1 month from the date of manufacture, provided that transportation and storage conditions are met. After this period, the product must be tested for compliance with technical specifications before use.

The fertilizer application rates were developed by the Department of Agrochemistry and Soil Science of Uman National University of Horticulture under the scientific supervision of Doctor of Agricultural Sciences, Professor Hospodarenko H.M., commissioned by AC Grossdorf. These recommendations are the intellectual property of AC Grossdorf and may be distributed only with proper attribution to the owner.
The provided application rates are generalized and do not replace the need for consultation with an agronomist.