Loosen Compacted Soils. Reduce Salinity. Improve Water Penetration.

Who this is for: Turf managers, landscape professionals, and soil growers dealing with high-clay, compacted, or saline-sodic soils that resist water infiltration and limit root development.

Biomend DG Black Gypsum is a dispersing granule formula combining calcium sulfate dihydrate with 12% humic acid derived from leonardite. The dispersing granule technology breaks apart on contact with moisture, delivering calcium and sulfur directly into the soil profile without tillage — improving structure, reducing compaction, and flushing excess sodium from the root zone.

Key Benefits

• Loosens hard-packed, high-clay soils — improves air and water movement through the root zone
• Reduces soil salinity — displaces sodium ions, restoring soil structure in saline-sodic conditions
• Delivers calcium (12%) and sulfur (8.9%) — essential nutrients applied directly to the root zone
• 12% humic acid — enhances microbial activity and nutrient availability
• No tillage required — dispersing granule activates with irrigation or rainfall
• Will not raise soil pH — safe for use on alkaline and neutral soils

Guaranteed Analysis

• Calcium Sulfate Dihydrate (CaSO₄ · 2H₂O): 48.0%
• Calcium (Ca): 12.0%
• Sulfur (S): 8.9% combined
• Humic Acid (from leonardite): 12%

Application Rates

Established Turf: 3–12 lbs per 1,000 sq ft | 130–520 lbs/acre — apply Spring and Fall

Newly Seeded / Hydroseeded Turf: 6–12 lbs per 1,000 sq ft — apply prior to or directly after seeding

Gardens & Crops: 12–20 lbs per 1,000 sq ft | 1.2–2 lbs per 100 sq ft for raised beds

Bulk Mixes & Backfill: 8–12 lbs per cubic yard

Salt-Damaged Areas: 12–20 lbs per 1,000 sq ft

Ornamentals: Small trees/shrubs: 1–2 cups | Larger trees: 1 cup per caliper inch

Tip: Irrigate 0.2–0.4 inches after application to activate dispersing granules and incorporate into the soil profile.

Available Size

50 lb bag