Rock flour consists of finely ground volcanic rock and contains many minerals.
Also known as:
Rock flour or glacial flour consists of finely ground volcanic rock and contains many minerals. Rock flour is considered to be a soil conditioner and fertilizer, but Wageningen University & Research research cannot confirm this.
On the other hand, experiments with rock flour on sandy soils (heather, forest) because they are poor in minerals do seem to have a positive effect on the availability of minerals such as calcium, magnesium and potassium in the soil.
Rock dust is a waste product of quarries.
Ground limestone is used to make the soil less acidic – pH (acidity) is increased.