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Is Rockwool Harmful? Yes, But…

Rock wool has long been a popular media for growing hydroponic fruits, vegetables and herbs. However, I’m going to make the case against rockwool and argue why you should never use rockwool again because rockwool is harmful.

This post has gotten a lot of attention recently, and as a result is in the process of being updated to include more information. I cite studies and in no way reference any particular company – I am talking about mineral wool as a growing media in this post.

If you want better alternatives to rockwool, please check out my hydroponic media guide.

It’s Not Environmentally Friendly