FAQ > General Information > What is the Difference Between Perlite and Vermiculite?
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Perlite is a naturally occurring volcanic glass that expands up to 20 times its original volume when heated. It resembles tiny white popcorn pieces, and in horticultural applications, is used as a soil amendment that improves drainage, and prevents soil compaction. It is inert, sterile, and free from disease, weeds, and insects.
Vermiculite is a naturally occurring mineral that resembles mica, and expands when heated. In horticultural applications, it improves water retention and air holding capacity of soil. It has low alkalinity, and absorbs excess nutrients. Like perlite, it’s also sterile, and free from disease, weeds, and insects.
Last updated on November 23, 2011 by Matthew Kokenes