Dolomitic Limestone | Black Swallow Living Soils, Brantford ON
Dolomitic Limestone. 2kg. $10. 22.68kg. $20. There 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.