Magnesium Sulfur Power fertiliser is a kind of medium element fertilizer that provides magnesium and sulfur elements. It's a good choice for ESTA Kieserit FINE Alternative
🔹 Product Overview
Magnesium Sulfur Powder is an important medium element fertilizer and ESTA Kieserit FINE Alternative that provides magnesium and sulfur elements, which is commonly preferred to be quickly-available magnesium fertilizer needed on very deficient soils and wide variety of plants.

Magnesium sulfur powder is essential for enhancing soil health and is widely used in organic farming practices.
| Items | Kieserite Powder | |
| Total MgO | %min | 25%~30% |
| Water Soluble MgO | %min | 5%~25% |
| Water Soluble S | %min | 20 |
| Cl- | %max | 0.5 |
| Moisture [After drying] | %max | 3 |
| Pb | ppm max | 10 |
| As | ppm max | 10 |
| Hg | ppm max | 1 |
| Cd | ppm max | 10 |
| Size | mesh | 80-200mesh |
Applying Magnesium sulfur powder can lead to improved nutrient absorption in plants.
1.Promotes chlorophyll formation and improves photosynthesis.
2.Enhances crop yield and quality.
3.Supports protein synthesis and nutrient uptake.
4.Especially beneficial for magnesium-sensitive crops like potatoes, citrus, tomatoes, coffee, and rice.
Rongqing Chemical Co., Ltd, one of China’s established sulphate producers, operates its magnesium sulfate and Magnesium Sulfur Powder fertiliser facilities in Yingkou, Liaoning, where known as China’s Magnesium Capital.
Leveraging Yingkou’s magnesite resources, Rongqing runs 5 modern production lines with sulphation technology, achieving a daily output of 500 tonnes for Kieserite granules (ESTA Kieserit FINE Alternative) and an annual capacity of 20,000 tonnes for magnesium sulphate.
Certified with ISO9001, FAMI-QS, and REACH registrations, Rongqing Chemical consistently supplys various trace element magnesium fertiliser raw materials to global branded fertiliser manufacturers, distributors, importers, high-end fertiliser R&D entities, and raw material procurement operations.
Application Method Dosage
1.Soil Application 50–100 kg/ha, depending on crop
2.Foliar Spray 1–3% solution, apply every 10–15 days
3.Fertigation 10–30 kg per hectare
Packaging Options: 25kg bag, 50kg bag, 1000kg jumbo bag (customized logo available)
Storage: Store in a cool, dry place. Avoid direct sunlight or moisture.
Choose Rongqing Chemical the China leading kieserite factories, Your Reliable Long-term Partner
Our Kieserite & Magnesium Sulfate products feature high purity, stable supply, international standards, and professional service. Exported to 40+ countries worldwide, we are trusted by leading fertilizer brands and large-scale farms.

Please kindly include your ESTA Kieserit FINE Alternative quantity requirements, destination port, and preferred incoterm (FOB/CIF/DDP) in your inquiry.
💡Contact us today to get the latest quotation and free samples. Let us support your fertilizer formulation and agricultural growth!
📩 Email: marketing@rqsulfates.com
📞 Tel: +86-151-1140-0823
💬 WhatsApp/WeChat: +86-151-1140-0823
Rongqing Chemical Co. Ltd, established in 1991, is a China-based kieserite Manufacturer & Exporter. Located in Yingkou Liaoning -the China magnesium We focus on kieserite,magnesium sulfate
E-mail :
marketing@rqsulfates.com info@rqsulfates.comWhatsapp:
86-15111400823Office Tel:
86-731-85864603 86-731-85864624
Moble Tel/Wechat:
86-18670090463 86-15111400823QQ:1265626382
Address:
Headquarters:Yuelu District,Changsha, Hunan, ChinaKieserite Factory:
Dashiqiao,Yingkou,Liaoning,ChinaWebsite
KieseriteRongqing Chemical Focus on Kieserite, Chinese Kieserite Magnesium Sulfate producing and exporting. 2025 All Right Reserved by Rongqing Chemical