Black Swallow Dolomitic Limestone pressed and most pH stable nutrients

and most pH stable nutrients on the market

provide a pretty pure calcium source

Rounded edges are super ergonomic for delicate branches

*Part of a 2-Part Grow Formula

Black Swallow Dolomitic Limestone pressed and most pH stable nutrientsThere are a number of calcium products that can be used in your soil. Some, like oyster shell, provide a pretty pure calcium source. Wollastonite is a calcium silicate, meaning that you get a good supply of silica along with the calcium. Gypsum, is calcium sulphate, and has a sulphur content. Calcitic limestone is calcium carbonate, which provides a valuable additional role in neutralizing acids in a soil. Dolomitic limestone is a combination of