GRODAN GRO-BLOCKS Delta 4, Small 3" withoug Holes

  • 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.

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