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Cement blocks for food garden borders #297287 - Ask Extension

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Cement blocks for food garden borders #297287

Asked January 19, 2016, 12:49 AM EST

I saw a note that cement blocks may contain fly ash and may leach heavy metals into the soil. Another article claims the elements in fly ash are below the levels already found in common soil. Do you have a definitive answer as to whether using cement block containing fly ash actually poses any danger?

Marion County Oregon

Expert Response

Concrete blocks are safe for gardening
Randy Williamson Replied January 25, 2016, 1:09 PM EST

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