Naturally occurring in marine sedimentary deposits. Greensand is composed primarily of the blue-green siliceous mineral glauconite. Traditionally used to loosen heavy clay soil or to hold together loose sandy soils. Greensand is able to absorb up to one-third its weight in water to improve the moisture holding capacity of garden soils and potting mixes.

Greensand 0-0-3 - 6lb - FREE SHIPPING *USA Only

$21.49Price