Down to Earth Gypsum | 1lb - OMRI Listed - (Case of 6)

OMRI Listed 325 Mesh Gypsum Powder for Drip Irrigation and Fertigation (1lb)

Down to Earth Gypsum is an OMRI Listed solution-grade 325 mesh powder composed of calcium and sulfur — two essential nutrients required for proper plant growth. Designed for efficient delivery and immediate uptake, this fine powder can be used in reservoirs, fertigation systems, drip irrigation, or spray applications. It is distinct from granular gypsum products in its fine particle size and suitability for liquid delivery systems.

The 1lb size (Case of 6) is convenient for growers who apply gypsum through irrigation or fertigation systems, or who want a concentrated supply for targeted calcium and sulfur supplementation.

Key Features & Benefits

• OMRI Listed — Approved for certified organic production.
• 325 Mesh Ultra-Fine Powder — Ground to 325 mesh for rapid dissolution and suspension in water for liquid delivery.
• Calcium and Sulfur — Provides two essential plant nutrients in a single application through irrigation systems.
• Designed for Fertigation and Drip Irrigation — Formulated for use in reservoirs, fertigation systems, drip irrigation, and spray applications.
• Immediate Uptake — Fine particle size supports efficient delivery and rapid availability for plant uptake.

Who Should Use Down to Earth Gypsum Powder

Gypsum Powder (1lb, Case of 6) suits growers who apply calcium and sulfur through liquid delivery systems including drip irrigation, fertigation, and reservoir-based growing systems. It is particularly valuable for those who need calcium and sulfur supplementation without switching to granular amendments or foliar sprays.

Calcium and Sulfur in Plant Nutrition

Calcium plays roles in cell wall formation, normal cell division, and proper fruit development. Sulfur is required for enzyme activation, protein synthesis, and chlorophyll formation. Both are classified as secondary macronutrients, meaning they are required in meaningful amounts for healthy plant growth. Applying them together as gypsum (calcium sulfate) through a drip or fertigation system allows for consistent delivery throughout the growing season without interrupting irrigation operations.

Frequently Asked Questions

What makes this Gypsum different from granular garden gypsum?

This Gypsum is a 325 mesh ultra-fine powder designed for liquid delivery through reservoirs, fertigation systems, drip irrigation, and spray applications. Granular gypsum is a soil broadcast amendment. The powder form allows it to be dissolved and applied through irrigation systems for efficient calcium and sulfur delivery.

Is Down to Earth Gypsum Powder OMRI Listed?

Yes. It is OMRI Listed and appropriate for certified organic production.

Can it be applied through drip irrigation?

Yes. It is designed for use in drip irrigation, fertigation systems, and reservoir applications. The 325 mesh particle size allows it to be suspended in water and delivered through irrigation lines.

What nutrients does Gypsum Powder provide?

Gypsum (calcium sulfate) provides calcium and sulfur — both essential secondary macronutrients for plant growth. Calcium supports cell wall formation and fruit development. Sulfur supports enzyme activation and protein synthesis.

Can Gypsum Powder be used as a foliar spray?

Yes. It can be applied as a spray application in addition to fertigation and drip irrigation uses. Follow current label directions for rates and application methods.