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166 Wilson Road, Middle Swan
Perth, Western Australia
08 9250 4575
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Dolomite 25
Otherwise known as calcium magnesium carbonate, Dolomite occurs as a type of limestone. It is widely used in industry and horticulture. Dolomite will supply calcium and magnesium to your soil, and will increase the alkalinity (raise pH) of soils. Add small amounts of dolomite to worm farms and compost piles to counteract acidity.
PH testing is recommended to ascertain the correct amount of a liming agent to be applied to the soil. Adding dolomite to already alkaline soils will result in nutrient deficiencies in plants.
To raise the pH of the top 100mm of soil, use dolomite at a rate of 150gms/m2 in sandy soil, more in heavier soils. It is better to add a little often rather than one large dose.
