Grodan

Grodan (Rockwool) is the industry standard in hydroponic and commercial cultivation substrates, used worldwide for its precision, cleanliness, and unmatched root-zone control. Their stonewool cubes, slabs, and blocks provide excellent air-to-water ratios, enabling rapid root development and consistent nutrient uptake.

Growers appreciate Grodan for its sterility, uniformity, and adaptability in high-performance systems such as drip irrigation, flood tables, and deep water culture hybrids. From seed starting with A-OK starter plugs to full-scale slab production, Grodan products are engineered for predictable, repeatable results.

Explore Grodan at Provision Gardens to elevate your hydroponic consistency with one of the world’s most trusted growing medias.

15 products

  • Grodan A-OK Starter Plugs - 1.5 Inch (98 Plugs)

    Grodan A-OK Starter Plugs - 1.5 Inch (98 Plugs)

    Grodan A-OK Starter Plugs - 1.5 Inch (98 Plugs)

    Grodan

    $24.45
    $24.45
  • Grodan A-OK Starter Plugs - 1.5 Inch No Wrap (98 Plugs)

    Grodan A-OK Starter Plugs - 1.5 Inch No Wrap (98 Plugs)

    Grodan A-OK Starter Plugs - 1.5 Inch No Wrap (98 Plugs)

    Grodan

    $20.88
    $20.88
  • Grodan Macroplugs - 50 Plugs

    Grodan Macroplugs - 50 Plugs

    Grodan Macroplugs - 50 Plugs

    Grodan
    $19.09
    $19.09
  • Grodan Block - 4x4x2.5 Inch (6 Blocks)

    Grodan Block - 4x4x2.5 Inch (6 Blocks)

    Grodan Block - 4x4x2.5 Inch (6 Blocks)

    Grodan

    $7.99
    $7.99
  • Grodan Pro MM 40/40 6/15 Plugs 1.5" - Single

    Grodan Pro MM 40/40 6/15 Plugs 1.5" - Single

    Grodan Pro MM 40/40 6/15 Plugs 1.5" - Single

    Grodan

    $0.39
    $0.39
  • Grodan Smart Tray

    Grodan Smart Tray

    Grodan Smart Tray

    Grodan
    $22.84
    $22.84
  • Grodan Block - 3x3x2.5 Inch (8 Blocks)

    Grodan Block - 3x3x2.5 Inch (8 Blocks)

    Grodan Block - 3x3x2.5 Inch (8 Blocks)

    Grodan

    $6.99
    $6.99
  • Grodan Cress Plate

    Grodan Cress Plate

    Grodan Cress Plate

    Grodan
    $2.40
    $2.40
  • Grodan Hugo Block - 6x6x6 Inch

    Grodan Hugo Block - 6x6x6 Inch

    Grodan Hugo Block - 6x6x6 Inch

    Grodan
    $5.92
    $5.92
  • Grodan A-OK 1.5'' Starter Plugs in Prefilled Tray

    Grodan A-OK 1.5'' Starter Plugs in Prefilled Tray

    Grodan A-OK 1.5'' Starter Plugs in Prefilled Tray

    Grodan
    $15.49
    $15.49
  • Grodan MM Starter Mini-Blocks - 1.5 Inch (45 Plugs)

    Grodan MM Starter Mini-Blocks - 1.5 Inch (45 Plugs)

    Grodan MM Starter Mini-Blocks - 1.5 Inch (45 Plugs)

    Grodan
  • Grodan Gro-Slabs - 8 Inch

    Grodan Gro-Slabs - 8 Inch

    Grodan Gro-Slabs - 8 Inch

    Grodan
    $15.00
    $15.00
  • Grodan MM Starter Mini-Blocks - 2x1.5 Inch (24 Plugs)

    Grodan MM Starter Mini-Blocks - 2x1.5 Inch (24 Plugs)

    Grodan MM Starter Mini-Blocks - 2x1.5 Inch (24 Plugs)

    Grodan
  • Grodan Gro-Block Jumbo Improved - 6x6x4 Inch

    Grodan Gro-Block Jumbo Improved - 6x6x4 Inch

    Grodan Gro-Block Jumbo Improved - 6x6x4 Inch

    Grodan
  • Grodan A-OK Starter Plugs - 2 Inch (50 Plugs)

    Grodan A-OK Starter Plugs - 2 Inch (50 Plugs)

    Grodan A-OK Starter Plugs - 2 Inch (50 Plugs)

    Grodan