Olivine Rock Dust is another type of volcanic rock. It is classified along with basalt as mafic, meaning that the dust will be high in magnesium and iron. 

Unlike basalt, which typically has around 2-3% magnesium, Olivine Rock Dust will have composition percentages upwards of 50%.

This dust should be used sparingly and for the express purpose of adding magnesium to a potting mix or garden soil.  The magnesium, along with the other trace elements will release slowly and does not easily leach away.

Advantages:

¤ Improves soil structure and drainage     ¤ Increase yields and quality

¤ Corrects mineral balance in the soil       ¤ Enhances the cation exchange capacity

¤ Enhances root fertility                               ¤ Steady release of iron and magnesium

¤ Will not "burn" plants or seedlings          ¤ Strengthens plant cell walls

¤ Raises pH in acidic soils                            ¤ Increase pest and disease resistance

¤ Increases phosphorus availability          

¤ Increases moisture holding properties of the soil

¤ Provides excellent source of macro and micro nutrients

How to Use:

¤ Typically start with 2.5-5lbs per 100 sf of garden space or 1/4 cup per cubic foot of potting soil.

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