Stonewool is recognized the world over as the ideal hydroponics growing substrate. Grodan stonewool is known for its quality, consistency and performance. These Mini-Blocks are excellent for starting seeds and cuttings and are easily transferred to larger stonewool slabs once
roots have been established. Three strips of 15 wrapped Mini-Blocks give you 45 total blocks each measuring 1.5" square.
hydroponic growing systems
hydroponics in the classroom
hydroponics in education
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