Pumice as a substrate for growing plants – Hydroponics

Pumice – a product of volcanic activity; it is a special type of lava with a high silicate content (over 65%). It forms when large quantities of compressed gases are released in a volcanic explosion. The sudden pressure drop causes the gases to expand. Upon cooling, a glassy, ​​very porous and light substance is formed (on average 0,5 g / cm³). Pumice is found in many parts of the world. One of the best is in Iceland. Pumice, ground to various sizes, finds many uses in construction and many industries. As a substrate, pumice has the same properties as lava. It is an inert substrate without buffering properties. Pumice has a low water-holding capacity. It is best used in mixtures. A mixture of coconut fiber and pumice stone gives a more aerated and lighter environment. If the bottom of the pot is lined with pumice, it will facilitate drainage and prevent stagnant water.

Literature

1. William Texier. Hydroponics for everyone. All about home gardening. – M .: HydroScope, 2013 .– 296 p. – ISBN 978-2-84594-089-5.