Vermiculite is a natural mineral that is often used in gardening and horticulture, including in cannabis cultivation. It is a lightweight, sterile, and absorbent material that helps improve soil quality and provide various benefits to plants.

Vermiculite is derived from a group of hydrated laminar minerals called phyllosilicates. It is formed through the weathering of certain minerals, such as biotite and phlogopite, and expands when heated to form a lightweight and porous material. The expanded vermiculite has a spongy texture and can hold water and nutrients, making it beneficial for plant growth.

In cannabis cultivation, vermiculite is primarily used as a soil amendment or component in growing mediums to enhance water retention, aeration, and nutrient availability.