Grodan Rockwool Cubes (1. 5 Inches) 49 Cubes

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 ismended 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.