Vermiculite is a mica-like substance of the silicate material is formed after high-temperature heating, water rapidly lost during heating and expanded, after the expansion of the volume equivalent to 20 times the original volume. So that the substance increased aeration porosity and water-holding capacity. 
 Agricultural, horticultural vermiculite, expanded vermiculite, through special processing and its main role is to increase of aeration and water-holding capacity of the soil (medium). Its fragile, with the use of time, it is easy to make the dense medium lose aeration and water retention, coarse vermiculite than fine to use a long time, and the results are good. Even a tiny seed planting medium and as mulch sowing, are thicker. 
 In agriculture, the vermiculite can be used as soil improver, due to having good cation exchange and adsorption can improve soil structure, storage moisturizing and improve the soil permeability and aqueous acidic soil becomes soil; vermiculite may also play a buffer role, hinder the rapid changes of the pH value, so that the slow-release fertilizer in the crop growth medium slightly excessive use of fertilizers, and allow no harm to plants; vermiculite can also be provided to the crop itself K, Mg, Ca, Fe, and a trace amount of Mn, Cu,, Zn and other elements contained. 
 In addition, for soilless cultivation for potting soil and regulators. As a to planting potted tree and Business seedbed nutrition grassroots particularly favorable for the transplanting of plants and shipping. Vermiculite can effectively promote root growth and the stable development of the seedlings. Water and nutrients necessary for plant growth for a long time, and can keep root sunshine temperature stability. Promote the rapid growth of plants; 
 Vermiculite absorbent, cation exchange, and chemical composition characteristics, so that it plays a fertilizer, Paul the multiple roles of water, water storage, breathable and mineral fertilizers. The tests showed: 10-20% of the expanded vermiculite mixed with fertilizer, crop yields can be increased by 15-20%. Features: light, water and fertilizer adsorption performance, does not rot, 3-5 years.