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Soil Amendments

Q.Sterilizing Lava Rock

Zone madison wi | Anonymous added on August 10, 2021 | Answered

can I Sterilize lava rocks in the oven?

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Certified GKH Gardening Expert
Answered on August 25, 2021

No, but you can get close to pasteurization. This will be more beneficial, anyway.

Set the oven on the lowest setting, and put a bowl of lava rock and water covered in foil in there for 3 hours. Take it out and let it cool, and strain it off.

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