To use diatomaceous earth outdoors, apply a fine layer to the perimeter of the patio or garden, paying special attention to any cracks and crevices in your walkways or patio. You can also apply it ...

Diatomaceous earth (DE) is a powder made of crushed algae fossils called diatoms, with a high concentration of silica. It has seemingly endless uses—water filtration, insulation, and insecticide, just ...

Diatomaceous Earth has to come in contact with pests for it to actually work. DE is a general pesticide, meaning it can kill healthy pollinators and other beneficial insects if used haphazardly.