Premium Gypsum for Soil Improvement

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Premium Gypsum for Soil Improvement is a high-quality calcium sulfate gypsum mined from top-grade sources and processed for agriculture. It provides 23% calcium and 18% sulfur to s upport plant growth, improves soil structure, and reclaims sodic soils without changing pH. 🏆 Since 1989 🧪 Lab Tested 🛡️ 90-Day Guarantee 🚚 Free Shipping $100+ This pH-neutral gypsum adds calcium and sulfur that are water-soluble and plant-available immediately, and can be applied year-round without burning plants. This mineral has been used for centuries to improve soil and crop production. Designed for diverse soils and crops, it supports drainage and root growth. Typical rates include heavy clay soils 40-80 lbs per 1000 sq ft (1-2 tons/acre) annually; sodic soils 80-160 lbs per 1000 sq ft (2-4 tons/acre) as needed per soil test; compacted soils 40-60 lbs per 1000 sq ft (1-1.5 tons/acre) annually; general maintenance 20-40 lbs per 1000 sq ft every 2-3 years. Tomatoes 1000-1500 lbs per acre pre-plant (prevents blossom end rot); citrus 2-4 tons/acre; peanuts 600-1000 lbs per acre; corn 200-500 lbs per acre; alfalfa 1-2 tons per acre. CDFA registered, organic-compatible, and made in the USA. 📋 Product summary: 23% calcium and 18% sulfur pH-neutral; does not raise soil pH Water-soluble and plant-available immediately Flocculates clay to improve drainage and aeration Displaces sodium in sodic soils Safe for year-round use; no burn CDFA registered Organic compatible Made in USA Soil Type Application Rate Purpose Frequency Heavy Clay Soils 1-2 tons/acre (40-80 lbs/1000 sq ft) Improve structure & drainage Annual or biennial Sodic Soils (High Sodium) 2-4 tons/acre (80-160 lbs/1000 sq ft) Sodium displacement As needed per soil test Compacted Soils 1-1.5 tons/acre (40-60 lbs/1000 sq ft) Improve infiltration Annual General Maintenance 0.5-1 ton/acre (20-40 lbs/1000 sq ft) Maintain soil quality Every 2-3 years Crop Type Application Rate Timing Special Notes Peanuts 600-1000 lbs/acre At pegging Critical for pod development Alfalfa 1-2 tons/acre Pre-plant or early spring High sulfur demand Corn 200-500 lbs/acre Pre-plant Band or broadcast Tomatoes 1000-1500 lbs/acre Pre-plant Prevents blossom end rot Citrus 2-4 tons/acre Spring/Fall Improves fruit quality Application Rate Method Lawn (Clay Soil) 40 lbs/1000 sq ft Broadcast, water in Vegetable Garden 2-4 lbs/100 sq ft Work into top 6 inches Flower Beds 1-2 lbs/100 sq ft Top dress or incorporate Potted Plants 1-2 tbsp/gallon of soil Mix into potting soil Calcium Source Comparison Feature Gypsum Calcium Nitrate Bone Meal Cal-Mag Plus Calcium Content 23% 19% 24% 5% Effect on pH Neutral ✓ Slightly raises Neutral Neutral Organic Yes ✓ No (Synthetic) Yes ✓ No (Synthetic) Additional Nutrients 18% Sulfur 15.5% Nitrogen 12% Phosphorus 3% Magnesium Best For Soil structure, sodic soils Fast calcium + nitrogen Organic gardens, phosphorus Hydroponics, container Breaks Up Clay Yes ✓ No No No Displaces Sodium Yes ✓ No No No Show more