Grodan Gro-Block Improved GR4 - Small 3" (3x3x2.6) No Hole - Shrinkwrap/Strip - Carton
Grodan Gro-Block Improved GR4 - Small 3" (3x3x2.6) No Hole - Shrinkwrap/Strip - Carton - Image 1Grodan Gro-Block Improved GR4 - Small 3" (3x3x2.6) No Hole - Shrinkwrap/Strip - Carton - Image 2

Grodan Gro-Block Improved GR4 - Small 3" (3x3x2.6) No Hole - Shrinkwrap/Strip - Carton

SKU: GRD286656
$299.99
Out of Stock
Questions? Call 419-725-2450

Quick answer

Grodan Gro-Block Improved GR4 - Small 3" (3x3x2.6) No Hole - Shrinkwrap/Strip - Carton should be chosen by water retention, drainage, container size, crop stage, and how often you want to irrigate.

Best fitGrowers choosing media or amendments around watering frequency, root oxygen, container size, and nutrient style.
Check before orderingLarge bags, compressed bales, and pallet quantities can change shipping method. Confirm size, weight, and quantity before checkout.
Grower tipDo not mix media blindly. Air space, pH behavior, and nutrient charge affect how often you water and feed.

Shopping guidance from Toledo Indoor Garden. Prices, availability, shipping rates, weights, and dimensions are verified during checkout.

Description

Sold individually.

This listing is for one Grodan Gro-Block Improved GR4 - Small 3" (3x3x2.6) No Hole - Shrinkwrap/Strip - Carton.

Grodan Grodan Gro-Block Improved GR4 - Small 3" (3x3x2.6) No Hole - Shrinkwrap/Strip - Carton ().

Rockwool growing medium for hydroponic cultivation.

Excellent water retention with consistent air-to-water ratio.

Sterile and pH stable.

Ideal for seed starting, cloning, and full-cycle growing.

Weight: 21 lbs.

  • Genuine Grodan product
  • Brand: Grodan
  • Category: Growing Media > Rockwool Blocks
  • Listed weight: 21.00 lbs
  • Listed dimensions: 2.6 x 3 x 2 in
  • Review product photos, selected option, specifications, and label directions before ordering

Specifications

SKUGRD286656
BrandGrodan
UPC570231509003
Weight21 lbs
Dimensions16 x 12 x 12 in
Shipping Weight21 lbs
Sold Ascase
MaterialStone Wool (Basalt Rock Fiber)
ManufacturerGrodan (ROCKWOOL Group)
PH~6.0 (neutral / inert)
ECInert — does not contribute EC
Pathogen-FreeYes — sterile manufacturing process
ReusableSingle-use recommended
Block Size3" x 3" x 2.6" (7.5 x 7.5 x 6.5 cm)
ModelGro-Block Improved GR4 (Small 3")
Volume (Per Block)23.4 cu in (275 mL)
Saturated Weight (Per Block)~275g (9.7 oz)
Water Holding Capacity~80% at saturation
Air Content~20% at saturation
Fiber OrientationVertical (improved drainage)
Product TypeVegetative Growth Block
Wetting AgentAdvanced Hydrophilic (Improved)
Compatible PlugsGrodan A-OK 1.5" or Macro Plugs
Wetting MethodSubmerge 10-15 min or overhead water 6-8 passes
PackagingNo Hole — Shrink-Wrap/Strip

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