Do you need to cement them in place?

Hi dlcat, thank you for your question. **No, these edging stones do not need to be cemented in place for most landscape applications.** They are typically installed in a shallow trench on a firm, level base with soil compacted around them to help hold them in position. For areas with curves, slopes, or where additional stability is desired, landscape adhesive can be used between units, but it is not required for a standard installation. We hope this helps with your project!