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Grodan Rockwool – 4x4x2.5in. Cubes, 6 pack w/holes

Amazon.com Price:  $12.68 (as of 20:06 EST- More info)

Made from molten rock spun into cotton candy-like fibers and then compressed into cubes
Use to support the requirement of the plant in the different plant stages
Absorbs nutrient solution while retaining plenty of oxygen for rapid plant growth

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Rockwool is an inorganic and sterile growing medium comprised of spun molten rock. An effective medium for rooting cuttings, rockwool supplies 20% air house when saturated, and does no longer contain nutrients. It is strongly recommended that rockwool be conditioned by soaking for eight hours in a pH 5.0-five.5 after which rinsing with pH 7.0 water. Water day by day.
hydroponic growing medium
excellent for seedlings and cuttings

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