• 0-3 mm
  

The stones formed by the adhesion of ashes and large and small pieces that are released by the Volcanic Eruption by forming stacks on top of each other are called volcanic tuffs. 
It is usually used in mixed soils for the purpose of ensuring the development and growth of plants.

• - Helps prevent weed growing, 
  - It does not occur a waste problem, 
  - It has water retention feature. It reduces irrigation costs and helps to prevent sludging in extreme rains, 
  - It is used to lighten pot soil, 
  - Helps to protect plants from root and root collar diseases, 
  - Helps protect seedlings and treelets from extreme heat and cold, 
  - Provides soil loosening and easy processing. 
  - It does not create salinity in the soil, helps to regulate the pH level of the soil, 
  - Its rich mineral structure helps to feed the plants, 
  - Helps to prevent insect, bacteria and fungal diseases, 
  - It has water filtering feature.