Stonewool is recognized the world over as the ideal hydroponics growing substrate. Seeds or cuttings are started in these Grodan Gro-Blocks and, once rooted, the blocks are transferred to a larger stonewool slab. Gro-Blocks can be planted directly into containers for soil gardening as well. This is a strip of eight 3"x3" x2.5" wrapped Gro-Blocks, without pre-formed holes. Grodan stonewool is known for its quality, consistency and performance.
hydroponic growing systems
hydroponics in the classroom
hydroponics in education
This item is heavily discounted or the manufacturer will not allow for a lower price. Additional discounts or coupons may not apply towards this item.