Fast-Acting Liquid Calcium & Sulfur for Soil and Fertigation Systems

Plant Food Co. Calcium Thiosulfate is a neutral-to-basic, chlorine-free liquid solution delivering 6% calcium and 10% thiosulfate sulfur in a single, fully compatible input. Functionally equivalent to liquid gypsum, it corrects calcium and sulfur deficiencies faster than dry amendments — without disrupting soil pH or clogging drip lines.

Trusted by commercial growers, specialty crop cultivators, and soil-focused operations that need a clean, reactive calcium-sulfur source that moves through the soil profile and integrates seamlessly into existing fertigation programs.

Nutrient Profile

• 6% Calcium (Ca) — supports cell wall integrity, nutrient uptake, and structural strength in actively growing tissue
• 10% Thiosulfate Sulfur (S) — drives enzyme activation, protein synthesis, and chlorophyll production; improves soil structure by displacing sodium in high-SAR soils

Key Benefits

• Chlorine-free formula — safe for chlorine-sensitive crops and biological programs
• Fertigation and drip compatible — clear liquid solution with no particulates; won't clog emitters or injectors
• Foliar application ready — can be applied as a foliar spray for rapid correction of acute calcium deficiencies
• Soil structure improvement — breaks up compacted, sodium-affected soils; improves water infiltration and root-zone oxygen
• Neutral-to-basic pH — won't acidify soil; compatible with most nutrient programs and water sources

Recommended Applications

• Correcting calcium and sulfur deficiencies in vegetable, fruit, and specialty crops
• Reclaiming high-sodium or compacted soils
• Fertigation programs requiring a clean, soluble calcium-sulfur source
• Pre-plant soil conditioning and in-season maintenance applications

Ships as a 2.5-gallon jug. Not available for shipment to Oregon.