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

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(as of 12/13/2019 at 18:26 UTC)

SKU: B000IXIPS8 Category:


Rockwool is an inorganic and sterile growing medium made from spun molten rock. A superior medium for rooting cuttings, rockwool provides 20% air space when saturated, and does not contain nutrients. It is recommended that rockwool be conditioned by soaking for eight hours in a pH 5.0-5.5 and then rinsing with pH 7.0 water. Water daily.


  • hydroponic growing medium
  • good for seedlings and cuttings


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