Perlite is a mined volcanic glass which is “popped” in ovens (like popcorn) to create an expanded lightweight growing medium. It is called as "Volcanic Popcorn".
Benefits of using Perlite in Potting Mix:
Perlite is stable and retains its shape in your soil mix
Perlite has a neutral pH, which makes it ideal as a soil amendment
Perlite contains no chemicals or nutrients
Perlite is a highly porous material
Perlite will trap air in the soil, ensuring that roots can perform their primary functions.
Adding perlite to potting soil is a good way to ensure the container garden drains well while also creating a light, fluffy soil for your plants.
You use less water in your gardening
Suitable for gardening and hydroponic systems