Down to Earth Solution Grade Gypsum | 5lb - OMRI Listed - (Case of 5)

325-Mesh Soluble Gypsum Powder for Fertigation and Drip Systems, 5lb

Granular gypsum works fine as a broadcast soil amendment, but it can't be suspended in water and run through a reservoir, fertigation line, or drip system the way a grower managing container or hydroponic production needs. Down To Earth's solution-grade Gypsum is ground to 325 mesh specifically for that use, delivering calcium and sulfur in a form fine enough for immediate suspension and uptake through liquid delivery systems.

The 5lb size, sold as a case of five, is convenient for growers who apply solution-grade Gypsum through irrigation or fertigation systems regularly, or who want a concentrated supply for targeted calcium and sulfur delivery.

Key Features & Benefits

• OMRI Listed — approved for certified organic production.
• 325 mesh ultra-fine powder — ground fine enough for rapid dissolution and suspension in water, unlike granular gypsum.
• Provides calcium and sulfur — supplies two essential plant nutrients in a single application through liquid delivery.
• Built for reservoirs, fertigation, and drip irrigation — designed for growers running liquid-delivery systems rather than broadcast soil application.

Who Should Use Down To Earth Solution Grade Gypsum

This fits growers applying calcium and sulfur through drip irrigation, fertigation, or reservoir-based systems who need a water-soluble form rather than switching to a granular soil amendment.

About Down To Earth Solution Grade Gypsum

Solution Grade Gypsum is one of the fine-mesh liquid-delivery minerals Down To Earth Distributors produces at its Eugene, Oregon facility, part of an OMRI Listed catalog the company has built since 1977.

Frequently Asked Questions

What makes solution-grade Gypsum different from granular gypsum?

This Gypsum is ground to 325 mesh, an ultra-fine powder designed for suspension in water and delivery through reservoirs, fertigation systems, or drip irrigation. Granular gypsum products are broadcast directly onto soil instead.

Is Down To Earth Solution Grade Gypsum OMRI Listed?

Yes, this Gypsum carries OMRI Listing, making it suitable for certified organic production. That status applies to this fine-mesh, solution-grade formulation specifically.

How is it applied through drip irrigation?

It's designed for drip irrigation, fertigation systems, and reservoir applications. The 325 mesh particle size lets it stay suspended in water and move through irrigation lines without settling out.

What nutrients does this Gypsum provide?

It provides calcium and sulfur, two essential secondary macronutrients. Calcium supports cell wall formation and fruit development, while sulfur supports enzyme activation and protein synthesis.

Can this Gypsum be applied as a foliar spray instead of through irrigation?

Yes, it can also be applied as a spray application in addition to fertigation and drip irrigation use. Follow the current label for rates and dilution by application method.