Best to be used in

Propagation & Nurseries
Stonewool cubes' beneficial structure and water retention properties make them exceptionally beneficial when starting seeds and rooting propagation cuttings.
Commercial Greenhouses
Among all other properties, stonewool creates a stable growth environment for crops roots, and does not spread desease, insects and weeds.
Commercial Hydroponic
The stonewool grow blocks and their properties make them an indispensable product and an ideal medium for any hydroponics growing system.
The RedRock


Predictable Water Mobility

RedRock Wool ensures uniform movement of water and nutrients throughout the plug, block, or slab. Our products will wet-up and dry back with predictability so growers can steer crops further than ever before. New tooling and technology blend horizontal and vertical fibers for the most homogenous and predictable water transport to date.

  • Eliminates channeling and dry zones.
  • Predictable water movement and nutrient availability
  • Water moves horizontally then vertically for full saturation

Other Stonewool Companies
  • Overall unreliable water dispersion in the root zone leading to plant stress and overall quality loss
Cylindrical Plugs Offer Benefits

RedRock Wool plugs are designed for mitigation of density changes in grow media, rapid transplanting, and improved plant development rates. Plugs fit perfectly into blocks to avoid compaction and air gaps around the root zone of young clones and seedlings. Predrilled holes rather than slits better hug and support infant crops during their first stage of development. Cylindrical plugs eliminate corners for increased uniformity and less overall deviation.

Growers pay a premium for high-grade Stonewool and maximum uniformity, don’t let your plugs interrupt perfection.

  • Accurate and hassle-free plant placement
  • Non-taper cylindrical plug shape mitigates unwanted density changes and air gaps
  • Greater plant stability and early stage rooting

Other Stonewool Companies
  • Square plugs lead to time consuming transplants and substantial density changes
  • High risk of breakage due to decreased overall stability and inconsistent material/plant bonding
Plug Workflow

RedRock plugs are plug and play. Simple transitioning from plugs to blocks requires little more than slipping a peg into a hole. Growers benefit from reduced damage from scoring or cutting of roots during transplant and plants benefit from a perfect fit into their new home. Compressing square plugs into blocks destroys sought after uniformity and predictable water mobility. Time is wasted and the result is a less consistent crop.

  • Once roots are visible simply place RedRock plugs
  • Cylindrical plugs protect plant roots and reduce transplant shock

Other Stonewool Companies

  • Other brands require cutting or tearing into the root zone before transplant
  • Square plugs are not designed for round holes
  • Compaction and air gaps left during transitioning causes uneven water mobility
Co-Extruded UV-Protected Wrapper

The little things make all the difference. RedRock blocks are tightly wrapped in co-extruded film that offers white exterior and black-out interior. WHITE ensures a cool root zone, BLACK keeps light and algae off stonewool, even around the outer perimeter. This recipe ensures better water management and less evaporation.

  • Co-extruded UV-protected film
  • Increased in root development

Other Stonewool Companies
  • Increased algae growth around the outer perimeter
  • Reduced root development
  • Less uniform water movement
Pre-Cut Slabs

Automation and lower labor costs drives profits. Therefore, RedRock offers pre-cut slabs that save time and increase consistency. Pre-cut 4-Inch squares for transplanting both 4-Inch and 6-Inch blocks ensures equal plant spacing, eliminates damage during the cutting process, and less time wasted.

  • Pre-cut slabs offer huge labor savings
  • Blocks are evenly spaced across the slab
  • Custom pre-cuts are available

Other Stonewool Companies
  • Damaged product while cutting transplant holes
  • Massive time wasted cutting and evenly spacing plants
Tight-Fit Wrapped Slabs

Custom tailored Tight-Fit film wrap on our slabs ensure better drainage and uniform water movement across the media. Water and plant nutrition are held accessible to the root zone and forced along a straight path through the stonewool to the drainage slit(s). Additionally, we have printed tracking information on every slab to ensure cultivators can check lots for quality and consistency cycle after cycle.

  • Tight-Fit wrappers ensure nutrient rich water is plant accessible
  • Increased uniformity in water distribution

Other Stonewool Companies
  • Sloppy wrappers hold water unevenly and interrupt uniform drainage
  • Increased risk of wrapper tear
  • Gaps pool free-draining water


RedRock Block vs. Grodan vs. Cultilene

August 9, 2021

Comparing the Top Names in Stonewool: RedRock Block, Grodan, and Cultilene In the commercial horticulture industry, names are everything and what is built with the name matters. A brand needs to be reputable, reliable, and able to deliver the same results every time with little to no differences. In the hydroponics realm there are three names that come up when...
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