We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.
Culinary

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

What is Perlite?

By Dorothy Distefano
Updated: May 17, 2024
Views: 10,361
Share

Perlite is a form of naturally occurring rock comprised predominantly of silica. The rocks are light and are filled with tiny cavities that hold moisture. One of the primary uses of perlite is for aeration and moisture retention in soil.

The natural shape of perlite lends itself to trapping moisture so that it is available to the root systems of plants. Its structure also allows for aeration within the growing media. This combination provides a healthy environment for many plants.

This growing medium is also used for hydroponic, or soil-free, gardening. The sterile, weed-free environment provided by the substance is very good for rooting cuttings. Its potential hydrogen (pH) is neutral, having little or no impact on soil acidity or alkalinity.

In areas where soil is heavy clay, it often helps plant roots penetrate, prevents standing water and surface crusting, and provides insulation for the roots to prevent damage from extreme temperature changes. Vegetable and flower gardens can be augmented by mixing perlite and peat moss into cultivated soil. A similar mixture may be used when planting trees or shrubs. Because the media will not deteriorate, such benefits typically last for several years.

Planting in containers may also be enhanced by adding this silica rock to the potting soil. It is light in weight and makes moving pots and planters easy. While the mixture will help the soil retain moisture, potted plants generally need more frequent watering than those in a garden.

Some gardeners prefer to enhance soil with vermiculite. Vermiculite is a mineral composed of alumino-silicate clay. It is sterile, holds three times its volume in water, and attracts nutrients. When mixed with soil, it presses the mix together, reducing air flow and trapping water, which is useful for moisture-loving plants. As this is a clay-based additive, it will need to be replaced as it breaks down over time.

Vermiculite and perlite may be used together. The perlite will maintain good aeration and drainage, while the vermiculite provides good nutrient retention. The two may be mixed in equal parts or adjusted according the particular garden or pot.

Interestingly, perlite is also used in construction to provide loose-fill insulation. It can enhance fire ratings and reduce noise transmission. Resistance to rot and vermin makes it an attractive choice for builders. The silica rock may also be used in industrial applications as a filter media. Cleaners, polishes, and soaps can include it as an abrasive ingredient. It can also be used as a high-performance filler for multiple sources, including plastics and cement.

Share
WiseGeek is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Editors' Picks

Discussion Comments
Share
https://www.wisegeek.net/what-is-perlite.htm
Copy this link
WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.

WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.