SO4 Pelletized Gypsum
SO4 Pelletized Gypsum from Calcium Products is a high-purity, pelletized calcium sulfate that delivers immediately available calcium and sulfur in a form that’s easy to spread and fast to react. Made from 92% pure gypsum and processed for uniform particle size, SO4 dissolves quickly in the soil to improve structure, increase nutrient availability, and support healthy plant development—especially in compacted or sodic soils.
Unlike lime, SO4 doesn’t alter soil pH, making it an ideal choice for high-pH soils that still require calcium and sulfur nutrition. The pelletized form ensures precise, dust-free application with standard spreading equipment, while the fine grind promotes rapid solubility and root zone uptake.
92% pure gypsum (calcium sulfate) for fast calcium and sulfur delivery
Pelletized for clean, uniform application
Improves soil structure, drainage, and porosity—especially in heavy or sodic soils
Supplies calcium without affecting soil pH
Enhances enzyme activity, chlorophyll formation, and nitrogen use efficiency
OMRI-listed and safe for organic use
Available in Short Ton Bulk Bags.
SO4 Pelletized Gypsum from Calcium Products is a high-purity, pelletized calcium sulfate that delivers immediately available calcium and sulfur in a form that’s easy to spread and fast to react. Made from 92% pure gypsum and processed for uniform particle size, SO4 dissolves quickly in the soil to improve structure, increase nutrient availability, and support healthy plant development—especially in compacted or sodic soils.
Unlike lime, SO4 doesn’t alter soil pH, making it an ideal choice for high-pH soils that still require calcium and sulfur nutrition. The pelletized form ensures precise, dust-free application with standard spreading equipment, while the fine grind promotes rapid solubility and root zone uptake.
92% pure gypsum (calcium sulfate) for fast calcium and sulfur delivery
Pelletized for clean, uniform application
Improves soil structure, drainage, and porosity—especially in heavy or sodic soils
Supplies calcium without affecting soil pH
Enhances enzyme activity, chlorophyll formation, and nitrogen use efficiency
OMRI-listed and safe for organic use
Available in Short Ton Bulk Bags.
SO4 Pelletized Gypsum from Calcium Products is a high-purity, pelletized calcium sulfate that delivers immediately available calcium and sulfur in a form that’s easy to spread and fast to react. Made from 92% pure gypsum and processed for uniform particle size, SO4 dissolves quickly in the soil to improve structure, increase nutrient availability, and support healthy plant development—especially in compacted or sodic soils.
Unlike lime, SO4 doesn’t alter soil pH, making it an ideal choice for high-pH soils that still require calcium and sulfur nutrition. The pelletized form ensures precise, dust-free application with standard spreading equipment, while the fine grind promotes rapid solubility and root zone uptake.
92% pure gypsum (calcium sulfate) for fast calcium and sulfur delivery
Pelletized for clean, uniform application
Improves soil structure, drainage, and porosity—especially in heavy or sodic soils
Supplies calcium without affecting soil pH
Enhances enzyme activity, chlorophyll formation, and nitrogen use efficiency
OMRI-listed and safe for organic use
Available in Short Ton Bulk Bags.
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SO4 supplies a balanced initial sulfur release and a steady supply throughout the growing season. AMS releases sulfur too quickly, and elemental sulfur releases sulfur too slowly, neither meeting the crop’s complete needs.
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SO4’s consistent pellet size allows it to be blended and applied with other dry fertilizers, which means it doesn’t require a separate application. It can be applied pre-plant in the spring, in-season via top dress or post-harvest in the fall.
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SO4 is pH neutral, meaning it will not acidify the soil like other sulfur sources. Proper soil pH maximizes a plant’s utilization of nutrients promoting good plant health and optimizing yield.
