History

Therm-O-Rock West started operation in Chandler, AZ in 1981.  Our focus is on producing the highest quality

expanded perlite and vermiculite products for the horticultural and building industries.  We market our

products through distributors, nurseries and “big-box” stores.

We are listed as a certified producer of organic materials by the OMRI Institute   OMRI independently tests

and certifies products as safe for organic gardening and applications under the USDA National Organic

Program.

State of the art blending and bagging lines are available for toll manufacturing of many types of

powdered products.

Here are a few photos of our plant--from raw