Grodan Gro-Block Improved GR40 Uni-Block

Grodan Gro-Block Improved GR40 Uni-Block

SKU: GRD287461
$178.99
Available to Order (701 available)
Inventory may be in-store or supplier warehouse. Call 419-725-2450 to confirm availability, handling timing, or shipping.

Quick answer

Grodan Gro-Block Improved GR40 Uni-Block should be matched to your growing media, water source, crop stage, feeding style, and pH/EC monitoring plan.

Best fitGrowers building a nutrient program around a specific media type, water source, and crop stage.
Check before orderingConfirm the listed SKU, dimensions, and ship weight match the version you want before checkout.
Grower tipStart from the label or feed chart, measure pH and EC, and increase strength only after plants show they are handling it.

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 GR40 Uni-Block. 8IN X 8IN X 4IN - NO HOLE - LOOSE IN CARTON - Grodan Improved Gro-Blocks utilize advanced hydrophilic technology and optimal density to improve water distribution and promote healthy root development.

Available as loose blocks or in strip format, these blocks feature a groove pattern on the bottom for compatibility with various cultivation systems, enhancing their versatility.

Each block includes a single plug hole, facilitating efficient transplanting of fully rooted Grodan A-OK or Grodan Macro plugs.

Made from stone wool derived from basalt rock, these blocks are lightweight, absorbent, and structurally sound, making them ideal for automated seeding and transplanting processes.

The unique hydrophilic fibers ensure rapid, even water distribution and offer excellent buffer and re-saturation capabilities, while the blocks' homogenous structure guarantees uniform nutrient availability, promoting consistent plant growth.

Stone wool also ensures that no water or nutrients are wasted, and that the material is free from pathogens or unwanted seeds, supporting healthy and productive plant cultivation. 0 x 8.0 x 4.0 in, shipping weight 24.00 lbs, material Stone Wool (Basalt Rock Fiber).

Weight: 24.00 lbs.

  • Genuine Grodan product
  • Brand: Grodan
  • Category: Growing Media > Rockwool Blocks
  • Listed weight: 24.00 lbs
  • Listed dimensions: 8.0 x 8.0 x 4.0 in
  • Review product photos, selected option, specifications, and label directions before ordering

Specifications

SKUGRD287461
BrandGrodan
UPC774783495376
Weight24.00 lbs
Dimensions8.0 x 8.0 x 4.0 in
Sold As1 individual item
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 Size8" x 8" x 4" (20 x 20 x 10 cm)
ModelGro-Block Improved Uni-Block (GR40)
Volume (Per Block)256 cu in (3,200 mL)
Saturated Weight (Per Block)~3,200g (7.1 lbs)
Water Holding Capacity~80% at saturation
Air Content~20% at saturation
Fiber OrientationVertical (improved drainage)
Product TypeFull-Cycle Production Block
Wetting AgentAdvanced Hydrophilic (Improved)
Wetting MethodSubmerge 30-40 min or overhead water 8-10 passes
PackagingNo Hole — Loose in Carton

Need Help?

Call us for expert advice:

419-725-2450

Mon-Fri: 9AM-6PM | Sat: 10AM-6PM | Sun: Closed