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(More customer reviews)These are just amazing! in two days after adding my starter rock-wool cube to my DWC bucket system I had roots sprouting through the bigger 4 x 4 cube. Just amazing! I did plant the 4"x4" cube into ceramic balls in the top of my 6" basket top. Make sure you set these in "Distilled water" for 24 hours first. THIS IS IMPORTANT. Good luck with yours
Click Here to see more reviews about: Grodan Rockwool - 4x4x4in. Cubes, 6 pack, w/holes
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.
Buy cheap Grodan Rockwool - 4x4x4in. Cubes, 6 pack, w/holes now.
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