Here in the horticultural substrate department, perlite. At discount prices Culture Indoor !!! What is Perlite ?

Perlite is a silica sand of volcanic origin, treated under high temperatures (about 1.200 °C) and with a high water retention capacity , 4 to 5 times its own weight!

Perlite is used as a substrate for cultivation, often mixed with other substrates such as a mixture of potting soil (Light) and vermiculiteit is used as a growing medium, often mixed with other substrates such as a mixture of potting soil (Light) and water, to be used for germination and cutting, but also to create a green roof, when combined with the pozzolan.

Available in packages of 5 liters or of 70 liters.

The best prices of the Web on perlite are at Culture Indoor