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What is LECA?

LECA, or Lightweight Expanded Clay Aggregate, is a type of porous, granular material that is made from clay that has been fired at high temperatures. It is commonly used as a soil-less growing medium in hydroponic systems, as well as in landscaping and construction projects.

One of the main benefits of LECA is its ability to hold water and air, making it an ideal growing medium for plants that require moist conditions. It is also lightweight and easy to work with, making it a popular choice for use in container gardens and other portable growing systems.

LECA is made by pelletizing clay and then firing it in a rotary kiln at high temperatures. This process causes the clay to expand and form small, porous balls that are lightweight and have a high surface area. The resulting material is then sieved to create different size grades, depending on the intended use.

LECA is widely available and can be purchased in different sizes and quantities from a variety of sources, including garden centers, hydroponic stores, and online retailers. It is generally considered a sustainable and eco-friendly growing medium, as it is made from a natural resource and can be recycled or reused.

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