Perlite: definition and meaning

Perlite: definition and meaning



Perlite is a sterile substance with a neutral pH, derived from siliceous volcanic rocks. It is treated at very high temperatures which make it grainy - spongy and white in color. It has the ability to absorb water 3-4 times its weight and is used in the ground to improve air circulation. It lasts several years, but when it becomes yellowish it means that it has deteriorated and must be replaced.

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