Down To Earth Solution Grade Gypsum (Calcium Sulfate)
Best soil amendment for organic gardeners seeking efficient nutrient delivery.
Down To Earth Solution Grade Gypsum is a high-performance soil amendment derived from mined gypsum, providing essential calcium and sulfur nutrients for plant health. This OMRI listed product contains 97% Calcium Sulfate Dihydrate. Its fine powder formulation ensures efficient nutrient uptake and immediate delivery without clogging irrigation systems. Beyond nutrition, this gypsum significantly improves the physical characteristics of your soil structure. It maintains a neutral pH, meaning it will not alter soil acidity levels. It is versatile enough for use in drip irrigation, reservoirs, or spray applications for lawns and vegetables.
$14.99
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4425
#50 in Fertilizers
Price vs Category Average
-76%
Below average
Composition
97422
/ % Calcium Sulfate Dihydrate (CaSOHO)
Who it's for
- Gardeners struggling with heavy, compacted clay soil
- Farmers using drip irrigation or liquid feeding systems
- Growers managing soil salinity or nutrient deficiencies
Who should skip it
- Gardeners needing to raise the pH of acidic soil
- Farmers working with highly porous or sandy soil
- Users sensitive to fine dust during application
Performance breakdown
Solubility efficiency
The 325 mesh powder dissolves seamlessly for clog-free irrigation performance.
Nutrient bioavailability
Quick-release formula ensures calcium and sulfur reach root zones immediately.
Soil structure impact
Effectively improves soil porosity without disrupting existing pH balance.
Organic compatibility
OMRI listing guarantees suitability for strict organic growing standards.
Application versatility
Adapts easily to drip lines, sprayers, or reservoir-based feeding systems.
Purity levels
High-grade mined gypsum provides a clean, concentrated mineral source.
Key Specs
Composition
97% Calcium Sulfate Dihydrate (CaSO42H2O)
Nutrients Supplied
Calcium and Sulfur
Particle Size
Smooth 325 mesh powder
pH Level
Neutral
Certification
OMRI listed
Package Weight
1 lb.
Fertilizer Form
Water Soluble Powder
Release Type
Quick Release
Features
- Designed for efficient uptake and immediate nutrient delivery
- Improves the physical characteristics of soil structure
- Will not affect soil acidity due to neutral pH
- Smooth powder formulation prevents clogging in systems
- Suitable for various hydroponic and irrigation setups
- Approved for use in organic growing operations
- Quick release of essential calcium and sulfur
What customers say
Customers consistently praise the superior quality and remarkable ease of use of this gypsum. Reviewers frequently note its fine texture, which dissolves quickly and integrates seamlessly into soil or liquid feeding systems, effectively avoiding clumping issues common with standard products. This high solubility translates directly into rapid effectiveness. Users report visible improvements in plant vigor and soil structure, establishing this amendment as highly valued by serious gardeners seeking reliable results.
Know before you buy
No, this product has a neutral pH and is designed to provide calcium and sulfur without altering your soil's acidity levels.
Yes, the product is formulated as a fine 325 mesh powder specifically to ensure it dissolves well and flows through irrigation systems without causing clogs.
Yes, Down To Earth Solution Grade Gypsum is OMRI listed, meaning it is approved for use in certified organic growing operations.
Gypsum helps improve soil structure by promoting better aeration and water infiltration, which is particularly helpful for breaking up heavy clay soils.
Yes, it is a quick-release formula that provides immediate availability of calcium and sulfur for efficient nutrient uptake.
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$15