Rockwool

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  • Block Covers 4" & 6"
    Block Covers 4" For blocks of rockwool and other grow media. Blocks light from media— reducing algae and pest problems. Use white side up to reflect light. Use toothpick to hold cover in place. Sold in pack quantities only. ..
    $8.00
  • Grodan Delta 10 - 4in Block 4in x 4in x4in w/ Hole
    Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different types of fibers. The purpose is to support the..
    $8.00 $9.95
  • Grodan Delta 10 - 4in Block 4in x 4in x4in w/ Hole Case
    Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different types of fibers. The purpose is to support the..
    $176.64 $220.81
  • Grodan Delta 4 Block 3in x 3in x 2.5in w/ Hole
    Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different types of fibers. The purpose is to support the..
    $4.47 $5.56
  • Grodan Delta 4 Block 3in x 3in x 2.5in w/ Hole Case
    Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different types of fibers. The purpose is to support the..
    $212.74 $265.93
  • Grodan Delta Hugo 6in Block 6in x 6in x 6in w/ Hole
    Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different types of fibers. The purpose is to support the..
    $2.70 $3.38
  • Grodan Delta Hugo 6in Block 6in x 6in x 6in w/ Hole Case
    Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different types of fibers. The purpose is to support the..
    $130.00 $162.55
  • Grodan Stonewool A-Ok Starter Plugs
    A-Ok Starter Plugs for starting seeds and rooting of cuttings prior to plugging into the larger Gro-Blocks. A-Ok plugs come labeled with instructions in a shrink-wrapped sheet that fits a standard 10 x 20 tray ..
    $6.88 $0.00
  • Grodan Stonewool Delta Starter Mini-Blocks
    Grodan Stonewool Delta Starter Mini-Blocks Mini-Blocks™ sit in a tray (flat) without support for easy starting of seeds and cuttings. These Mini-Blocks™ are individually wrapped in white plastic to minimize algae growth. Remove wrapping and transplant into any loose media such as Grow-Cubes™ or coco..
    $6.88 $8.60
  • Grodan Stonewool Gro-Slabs
    Gro-Slabs provide the final stage for growing a spectacularly large plant. Transplant your Gro-Block plant onto a slab just like professional growers. They come in clearly marked biodegradable UV resistant sleeves for comfortable handling and algae prevention. Uni-slab - All plant roots are protecte..
    $4.50
  • Grodan Stonewool Growcubes
    Grodan Growcubes are small loose 1/2” cubes of stonewool. Advantages are better aeration, maximum drainage so that you can hardly ever over water your plant, easy mixing with other loose media (such as expanded clay rocks or coconut fiber), lightweight and much cleaner than peat-based media. The pro..
    $20.69