Grodan Delta Blocks (216 Box) - 100mm x 100 x 65 (4 inch) Small Hole (305663)

Grodan Delta Blocks planting on blocks Once seeds or cuttings are rooted in a propagation cube, transplant them to a Grodan Delta Block. 3” and 4” blocks are ideal for use in NFT, slab culture, dripper or Ebb & Flood systems. 6” Hugo cube can be used for deep Ebb & Flood tables or passive pot culture.