Wollastonite

Heavy Metals (PPM)

Arsenic       2.1

Cadmium     0.52

Mercury        <0.01

Lead         1.9

Nickel         1.6

Source:   Data From Oregon Department of             Ag Organic Certification Database

Wollastonite is a calcium silicate mineral amendment that increases the soil pH.

Wollastonite has about 80% of the liming power as Ag Lime and acts more slowly. This makes is a good product in combination with ag lime to add more buffering capacity to your soil.

The biggest benefit of wollastonite is in the silica that is provides. Wollastonite is the least expensive source of silica in organic production, making it a key tool for organic growers.