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Pacific Pearl Oyster Shell Flour (Calcium Carbonate)

$ 21⁰⁰

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Size

4 lbs 13 lbs 25 lbs 50 lbs

Reusing your soil? Get a soil test with analysis and add only the amendments your soil is actually missing. Learn about soil test analysis or take our quick quiz.

Slow-release calcium

High-purity, feed-grade calcium carbonate from oyster shell, clam shell and coral. It helps balance soil pH, improves nitrate uptake and strengthens plant cell walls.

Key things we want you to know

Flour vs. crushed: flour releases calcium faster. Low in magnesium.
Bonus: coarse texture helps drainage and reduces compaction.
Best timing: late spring or summer.
Shipping: free in the continental USA.

Ingredients

Crushed shell calcium carbonate, oyster shell and calcium.

Application & Mixing

Suggested Application

Gardening use: The best time of year to amend with this product in your garden is late spring or summer.

Storage

Store in a dry, secure area to prevent contamination and caking.

Sizes, Shipping & Bulk

Free shipping in the continental USA only. Does not include Alaska, American Samoa, Micronesia, Guam, Hawaii, Marshall Islands, Northern Mariana Islands, Palau, Puerto Rico, US Virgin Islands, Armed Forces Americas, Armed Forces Europe or Armed Forces Pacific.

Reviews (8)

Shipped quickly

Shipped quickly. I’m only a state away so it got here fast. Worms love it!

Good stuff

Good stuff, great for old-school organic gardening, as it replaces the need for dolomite.

Great product

Great product, very fine grind and consistent.

Top shelf !!!

The best

Great quality!