Horticultural vermiculite http://www.hebeizhishi.com vermiculite horticultural vermiculite conventional specifications have two kinds :1-3mm (nursery vermiculite) ,2-4mm (use flowers horticultural vermiculite), also according to customer requirements of production models horticultural vermiculite. Horticultural vermiculite is specially designed for processing of expanded vermiculite, its main role is to increase the aeration and water holding capacity of soil (media). Because of their fragile, with the extension of the use of time, easy to lose aeration and water retention medium dense, coarse vermiculite fine use of time, and the results are good. , Horticultural vermiculite should choose a larger flake vermiculite, even if the media of small seed sowing and planting as coverings are thicker as well. 

 A vermiculite silicate materials heated at high temperature the formation of mica-like substance. Its water in the heating process is quickly lost, and expansion of the volume expansion is equivalent to 8-20 times the original volume. So that the material increase in aeration porosity and water retention capacity. 

 Two. Horticultural vermiculite bulk density of 130-180 kg / cubic meter, was neutral to alkaline (ph 7-9). Per cubic meter of Vermiculite can absorb 500-650 liters of water. After steam sterilization, release the right amount of potassium, calcium, and magnesium. 

 (3) as a horticultural vermiculite, its main role is to increase the aeration and water holding capacity of soil (media). Because of their fragile, with the extension of the use of time, easy to lose aeration and water retention medium dense, coarse vermiculite fine use of time, and the results are good. , Horticultural vermiculite should choose a larger flake vermiculite, even if the media of small seed sowing and planting as coverings are thicker as well. 

 (4) purposes: 
 A. planting media one of the main material, mixed with peat, perlite and other use. 
 B. seeding mulch. 
 C. appropriate to adjust the pH value of the medium.