Cultiwool - Rockwool Cubes

🪨 Type: Inert Structural Media
Contains no nutrient content by design — this is texture, drainage, and aeration, not food. Meant to be used as a standalone medium, a mix-in component, or a soil amendment.

Cultiwool Rockwool Transplanting Cubes

Propagated plants in rockwool? Establish them in these transplanting cubes before moving them on to any kind of system.

• Quick & easy water uptake
• Even water distribution
• Rich root growth - airy media that holds water
• Complete control - no nutritional content
• Clean, sterile & disease free
• Drainage grooves - also keep roots raised when they emerge.

Make sure the hole size you pick is large enough for your propagating cube.

Rockwool is clean & lightweight - a great growing media that suits any system or method.

Also Ideal for Rooted Houseplant Cuttings & Semi-Hydro Conversion

Once a cutting has rooted in a small propagation cube, these larger transplanting cubes are the natural next step — giving Pothos, Philodendron, and other houseplant cuttings room to establish a fuller root system before potting into soil or LECA. The sterile, inert structure means zero risk of transplant shock from nutrient overload, which matters when you're a few weeks into growing something you care about.

RHP certified - highest category for wetting up

Cultiwool stonewool holds the highest level of RHP certification for the initial pre-soak. With such a high ability to uptake and spread water, you get an even spread of nutrient solution throughout.

Overall, growth is incredibly uniform and you get a dense root ball that utilises your entire block.

Robust - holds its structure

Rockwool is known for holding its structure. You can saturate it and re-saturate it without it damaging the structure. It's great in hydro - you don't need to worry about bits of media clogging your systems.

No nutrient lockout

Unlike other medias, you won't get nutrient lockout in rockwool. Any nutrients and water you dose with are available for uptake and take immediate effect.

Clean & Sterile

These rockwool cubes are known for being clean, sterile and free of diseases.

Ideal rooting environment

Rockwool is known for holding lots of water and for having a porous structure that holds air. This is the ideal environment for rich rooting.

Inert - complete control

Cultiwool rockwool has no nutritional content - it is completely inert. This gives you complete control over your feeding programme.

Fight algae growth

To improve water flow beneath the block, there are drainage grooves. These, along with the black and white foil prevent algae growth.