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Grodan Rockwool – MM Blocks 5x5x5 Pack of 9

100 EGP


Rockwool is lightweight hydroponic substrate that is manufactured through heating basalt and chalk at very high temperatures, the liquid is then spun into threads and compressed into wool packets. The product is then cut into slabs, blocks or plugs. They are great for beginners, easy to set-up and use and they promote a healthy plant life.

Product Details


5x5x5 cm


Pack of 9

Country of Origin



  • Rockwool is a widely used substrate in horticulture for the production of plants as varied as tomatoes, melons, cucumbers and strawberries. 

  • Suitable for flower and vegetable propagation.

  • Block shape for easy and effortless start-up of propagation.

  • Uniform water content and electrical conductivity.

  • Easy water content management.

  • Promotes excellent root growth.

  • Greater firmness for better handling.


How to use

1- Fully wet the substrate before use, the rockwool should be fully saturated with water before use then left to drain.

2- Wear a dust mask when handling any product made of rockwool as inhaling the fibers is dangerous for your lungs.

3- Insert seeds in the hole on top of the cube.

4- Water your plant using a hydroponic nutrient solution.

5- Common mistakes made with rockwool is overwatering, make sure to study the needs of the plant.

6- You can transplant your plant into soil if you want once they reach a height of 5 to 7 cm.


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