Diatomaceous earth is made from the remains of tiny single celled algae called diatoms, which make shells for themselves out of silica.  When the diatoms die, the shells settle on the bottom of sea or lake beds and fossilize into a soft, chalky rock like substance. 

There are many DE deposits around the world which are mined for use in industry and agriculture. 

One of its main benefits to gardeners is its role in natural pest control.  It is also naturally extremely absorbent.

DE’s microscopic structure consists of many sharp edges.  These tiny shards come into contact with insects and piece the waxy exoskeletal layer, causing fatal dehydration.  Because the effect is mechanical, it is impossible for the pest to build up immunity.

DE can be dusted, sprinkled, raked, mixed with water and sprayed over plants or around the house and garden where pests are a problem.  Note – DE will also harm beneficial insects like bees, so please use it judiciously.  It is not a poison, so do not expect instant results, however DE will continue to work as long as it is present in the environment. 

DE is also useful sprinkled in & around chook pens, kennel areas, etc.  It will help control ticks and mites, but also prevents breeding of flies in droppings.  It will deodorise and absorb odours from these areas.  It can also be used externally in animal fur to control ticks and fleas (dusted through), and internally to treat parasites (please do your own research on this!).  Food grade DE is not poisonous to humans or animals.

DE is composed of silica, but also contains other trace minerals.  When used in soils, it aids in:

- Increases water holding capacity, and aids nutrient
  retention
- Encourages beneficial microbial soil activity
- Boosts plant tissue strength, meaning more pest and
  disease resistance
- Converts locked up phosphorous into a plant available form
- Decreases soil salinity by diluting sodium content

DE is a beneficial addition to compost heaps.  It aids with controlling odours and to prevent pests breeding.  It will not harm earthworms, provided it is sprinkled on the top of the soil to allow worms to slowly digest it and work it in.

DE can also be used inside the house, and is useful in eradicating cockroaches, ants and bed bugs!

Important Notes:

Use only food grade DE.  Pool filtered DE is chemically treated and is poisonous.

Our DE is registered in Australia as Animal Food Grade (but not for human consumption) and is Certified Organic by BFA.

Health warning: 

Care should be taken when using DE.  Wear a dust mask, eye protection and gloves.  While it is non toxic the tiny particles can be drying to skin and hands, and harmful if inhaled.  Always wash hands after use.