One of the benefits of a rock-based material is its durability. Following proper sanitization procedures will extend the lifecycle for rockwool allowing it to be re-used multiple times. Make sure the stonewool is properly cleaned and sanitized with all roots and organics from the previous harvest removed. Re-use is the most ideal solution for home growers

What was once old has become new. Grodan re-manufactures used material post-harvest into new blocks and slabs. ROCKWOOL facilities in the Netherlands, Denmark, and Russia are presently offering these circular programs with additional sites in north-western Europe and North America in development.

Grodan works with several brick manufacturing facilities throughout Europe to re-manufacture used stonewool into clay for bricks. Thousands of tons of stonewool are re-manufactured into bricks every year.

Grodan’s stonewool is an excellent beneficial use amendment and provides many technical benefits to finished compost. Many industrial composting facilities throughout North America and Europe accept stonewool in their inbound feedstock streams, finding new homes for thousands of tons of stonewool every year. If you are unsure if your local compost facility accepts stonewool or would like them to start contact us.

Stonewool’s strong insulating and water holding properties make it an excellent amendment for industrial bedding and topping or to prevent erosion. The stonewool is used as an alternative cover to help prevent noxious odors from effecting local communities. Its also used as a safety measure to fight the spread of diseases and potential fires that could erupt in landfills or mines.

Stonewool can be ground up and mixed in with potting soils to provide many added values including nutrients from the initial growing periods and added porosity & water holding capacity.