Vermiculite refers to a small group of minerals resembling the lamella structure of the micas, which expand or exfoliate greatly when heated rapidly. Its consumption is mainly in horticultural uses with other applications in construction and insulation.

Although much research has been performed on the chemical and structural composition, there is not yet complete agreement on the exact formula. Vermiculite is not considered to be a single mineral specified, but a family of related minerals.

Vermiculite characteristics:

Physical appearance of vermiculite

Vermiculite is dark blackish grey-brown to golden brown in color, and is flake shaped when dry.

Horticultural applications

In horticultural applications, vermiculite is used throughout the world as a component of soil's growing mixes, where it provides aeration and optimum moisture retention for superior plant growth.

Other benefits of horticultural vermiculite are its neutral pH. In addition, its lightweight makes it ideal for use in container growing.

Other horticultural applications for vermiculite are as a carrier for fertilizer, herbicides and pesticides and for pelletizing seed. Horticultural vermiculite is as useful to the home gardener as it is to the commercial grower. It is used with equal success in greenhouse growing, landscaping applications and in houseplants.

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