How to Reuse Rockwool

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    • 1). Scrape rockwool with a serrated knife to remove any leftover roots. Pick the roots out of the rockwool as they become loose.

    • 2). Mix a solution of one part hydrogen peroxide and eight parts water in a plastic bucket. Hydrogen peroxide will sterilize your rockwool and will break down into water after 24 hours.

    • 3). Submerge the rockwool in the hydrogen peroxide and water solution. Allow the rockwool to soak for 24 hours before removing.

    • 4). Use the saturated rockwool in your gardening projects immediately. Rockwool will not redampen evenly if it is allowed to dry.

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