Made from basalt rock that is heated and spun into cotton candy-like fibers. Great capacity for absorbing nutrient solutions while retaining plenty of oxygen for rapid plant growth, ensuring even distribution of roots. Each cube is individually wrapped in UV resistant plastic on 4 sides to hold the block together. The base of the growing blocks are grooved to promote drainage.
Item Model Number:
2.5 x 2.75 x 2.5 inches.
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