Weathered soil is a kind of soil hardened by clay, which is broken and cracked into rock layers. It is formed by compaction, dehydration and recrystallization of clay. Weathered soil is suitable for planting acidic and slightly acidic plants, especially orchids, because it has strong air permeability and drainage, is not easy to accumulate water and is rich in trace elements.
Weathered soil is the long-term interaction between rocks and air, water, carbon dioxide and other substances, or under the influence of temperature, biology and water, many rocks with different shapes or broken sand grains are formed, which is the product of long-term geomantic erosion and has limited nutrients.