If you’re looking for a soilless substrate for seed starting, stem rooting or hydroponics, consider using rockwool growing medium. This wool-like material is made by melting basaltic rock and spinning it into fine fibers. Rockwool for plants is then formed into easy-to-use cubes and blocks. But is rockwool safe to use for the production of food? Formed from natural materials, Rockwool contains no harmful chemicals. It's safe to use as a rooting medium and substrate material for plants. Due its physical structure, rockwool drains excess water quickly. Yet, it retains small amounts of water near the bottom of the cube.
Rockwool
Grodan Rockwool Cubes
Grodan Rockwool Cubes are ideal for raising seedlings and cuttings. Clean, sheer weight, and supplied in their own plastic tray for easy handling continue to be one of the most popular growing mediums we sell.
£0.10
Grodan Hugo Block
Grodan Hugo Gro-Blocks can support many species throughout their lifecycle. The Grodan Hugo Block is Grodan's answer to pot culture. If you want a rock wool block to grow the best and biggest plants the Hugo is the answer.
£2.50
Grodan Vital Rockwool Slabs
Grodan Vital is highly versatile and perfect for growing tomatoes, sweet peppers, cucumbers and eggplants. The Grodan Vital stone wool slab for vegetable crops is based on NG2. 0 technology. The improved slab structure and physical properties guarantee ra
£6.00
Grodan 90 Litres of Grow Cubes
Grodan Rockwool Mini Grow Cubes (also known as Cellmax) are great for use as a growing medium on their own or for making your own grow-mix.
£69.95
