Rockwool Cubes - Grodan Brand

What would happen if you heated up basalt (a naturally occuring volcanic rock) to the point where it becomes liquid and decided to spin it like fairy floss? You would end up with an awesome hydroponic soilless substrate! These rockwool cubes are exactly that, with the outcome being a super light, and absorbant hydroponic growing substrate that maintains perfect aeration and moisture levels at all stages of plant growth.

Features

Rockwool is the ideal growing medium for germinating most types of seeds, propagating cuttings or even growing transplants. High success rates mean you spend less time struggling and more time growing! 

• Contains no harmful chemicals, weeds, diseased soil or pests.
• Pathogen free.

These mats are made by Grodan - the market leader in rockwool. The substrates from Grodan are the only stone wool growing media awarded an EU Ecolabel. Rockwool from the market leader means consistent quality, peace of mind that what's in your rockwool is safe, and better growth!

Specifications

Specifications

Dimensions of each regular cube: 40x25x25mcm, large cubes are 40x40x40mm.

• Regular size are tapered to fit into netcups
• Small indents for cuttings and seeds.
• Can easily be broken up by hand or with a scissor.
• Available in 24, 72, or 200 packs for incredible value.

Instructions

How to use rockwool cubes

To use these simply soak them in water for 10 minutes before planting two or three seeds (its always good to have a backup) per rockwool cube. The cubes can be partially submerged in water, or bottom irrigated with a trickle of water to keep them moist. Note that they don't need much water as they're super absorbent!

When the roots start to grow out of the cubes, then you can place the cubes within another growth medium, soil, or directly in water and let them grow!