Down to Earth Calcium 96 | 1lb - OMRI Listed - (Case of 6)

Ultra-Fine Limestone Powder for Rapid Calcium Delivery and pH Correction, 1lb

Standard agricultural lime works slowly because its particles are coarse, which is a problem when a grower needs faster calcium availability or quicker pH correction than a season-long timeline allows. Down To Earth Calcium 96 grinds natural limestone to 325 mesh, giving it a high neutralizing value that reacts faster in soil and works at lower application rates than typical ag lime.

The 1lb size, sold as a case of six, suits growers applying Calcium 96 via drip irrigation or spray systems, or those maintaining a supply for targeted calcium applications in small to medium growing areas.

Key Features & Benefits

• 325 mesh particle size — ultra-fine grinding allows faster dissolution and calcium availability than coarser lime products.
• High neutralizing value — raises soil pH efficiently at lower application rates than typical agricultural lime.
• OMRI Listed — approved for certified organic production.
• Drip irrigation and spray compatible — the fine particle size allows application through irrigation systems or as a spray.

Who Should Use Down To Earth Calcium 96

This fits organic growers who need rapid soil pH adjustment or targeted calcium supplementation, particularly those using drip irrigation or spray systems where fine particle size and quick solubility matter.

About Down To Earth Calcium 96

Calcium 96 is one of the fine-mesh limestone products Down To Earth Distributors packages at its Eugene, Oregon facility, part of an OMRI Listed catalog the company has built since 1977.

Frequently Asked Questions

What is the difference between Calcium 96 and standard agricultural lime?

Calcium 96 is ground to 325 mesh, much finer than standard ag lime. That fine grind gives it a high neutralizing value, letting it react faster in soil and raise pH more quickly than a coarser product would.

Is Down To Earth Calcium 96 OMRI Listed?

Yes, Calcium 96 carries an OMRI Listing, making it an option for certified organic soil programs. That certification covers this 325-mesh limestone formulation.

Can Calcium 96 be applied through a drip irrigation system?

Yes, the 325 mesh particle size is designed for drip irrigation and spray applications. That fine grind is what makes it compatible with fertigation setups where coarser lime products would clog lines.

How does Calcium 96 compare to gypsum as a calcium source?

Calcium 96 is derived from limestone and raises soil pH as it releases calcium, while gypsum provides calcium without significantly altering pH. Choose Calcium 96 when pH correction is also needed; choose gypsum when only calcium is the goal without a pH shift.

What are the benefits of calcium for soil and plants?

Calcium supports cell wall integrity, root development, and fruit quality in plants, and it also plays a role in soil microbial activity. Calcium deficiency can show up as tip burn in leafy greens or blossom end rot in tomatoes and peppers.