Diahydro is the newest natural growing medium available.
Large granules of diatomaceous earth provide a white, sterile, insect killing, moisture-holding, easily drained, airy substrate that leaches small amounts of silicate into the water. Ideal for all plants. Results in trials are quite incredible. Roots grow bigger, faster and healthier. Has traces of minerals and nutrients. Amazing with the Autopot kits. Soil Association certified for use in organic agriculture.