Diatomaceous Earth is a naturally occurring sedimentary rock that easily powders.
It is, quite literally, fosillized animal and plant material, and, as such, will not harm your plants, soil or pets in any way.
It is however quite the nemisis of the insect and invertebrate population in your garden.
Physically it irritates the insect pests and dries out the slugs and snails.
It is not a chemical or poison and what does not deal with the pests, goes back into the the soil, to enhance it's viability.
Most gardeners will not need huge quantities of this and it does not need to be applied unless there is a problem in the garden, so we have packaged up 100 g bags to easily include in with seeds or plants without affecting the normal postage.
One 100g bag is $5.00