Do Oyster Shells Deter Slugs? The Evidence

Crushed oyster shell beside a Pacific Northwest garden bed

Crushed oyster shell can look like a practical garden-bed barrier, but a rough surface is not the same as proven slug control. The short answer is that current evidence does not establish crushed oyster shell as a dependable way to stop slugs or snails. So, do oyster shells deter slugs? They may be marketed or…

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Crushed Oyster Shell: Uses, Coverage, and Installation Guide

Crushed oyster shell path and patio being raked in a Pacific Northwest garden

Crushed oyster shell is a recycled, porous aggregate used for paths, patios, driveways, garden beds, courtyards, fire pit areas, and bocce courts. For a durable result, plan the area first, prepare a stable base where the application calls for it, spread the shell to a consistent depth, then compact it with light water. Shell flour…

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