Perlite is a lightweight, porous volcanic rock that is commonly used as a growing medium or soil amendment in gardening, horticulture, and hydroponics. It is formed by heating and expanding natural obsidian or perlite ore to create a unique, porous structure that has excellent drainage and aeration properties.

Perlite is widely used in gardening and horticulture due to its numerous benefits. Its lightweight nature allows for easy handling and transportation, and it does not compact over time, ensuring good aeration and drainage for plant roots. The porous structure of perlite also provides ample air pockets, promoting oxygen exchange and reducing the risk of root rot caused by waterlogged soil.

Perlite is pH-neutral, which means it does not affect the pH of the growing medium, allowing for greater control over the pH levels for different plants. It also has a neutral color and does not decompose, making it a durable and long-lasting addition to potting mixes or growing mediums.

In addition to its physical properties, perlite is also sterile and free of harmful pathogens or pests, making it a safe and clean option for plant growth. It does not contribute to nutrient levels in the soil, allowing for precise nutrient management in hydroponic or container gardening systems.

Perlite is commonly used in various gardening applications, including seed starting, propagation, and container gardening. It can be mixed with other growing mediums or soil to improve drainage and aeration, or used alone in hydroponic systems. Perlite is also used in commercial horticulture for growing crops like tomatoes, peppers, and flowers.

Some key features of perlite include:

• Lightweight and easy to handle
• Excellent drainage and aeration properties
• pH-neutral and does not decompose
• Sterile and free of harmful pathogens or pests
• Suitable for various gardening applications
• Does not affect nutrient levels in the soil
• Durable and long-lasting

Note: Perlite is an inorganic material and should not be confused with vermiculite, which is an organic material with different properties and uses in gardening.