Olivine Rock Dust
Was $5.00
SAVE 31%
$3.44
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Olivine is a volcanic rock. It is classified along with basalt as mafic, meaning that the dust will be high in magnesium and iron. This product should be used to add 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. Calculate for 20% elemental Mg when performing your own mineral amendments. Product Label
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$5
$3.44
(-$1.56)