Tung-born sand is a kind of volcanic sand, which is reddish brown, hard in texture, not fragile, and has good air permeability and water retention. It is named after the life of Toyo in Japan, and contains a lot of Fe2O3 (iron oxide) in the form of hard stone sand. This medium has good permeability, water storage, fluidity and drainage.

Use:

Widely used in horticultural production, it is often used in high-grade bonsai soil, potted plants such as stones, cacti, succulents, orchids and deciduous plants, and is also a good soil improvement material. Mixing with red jade soil can improve soil drainage, comprehensively improve soil conditions and effectively promote plant growth.

Extended data:

Japanese growers like to use tung sand as a medium for raw stone flowers. Tung raw sand is completely granular, well drained and contains almost no organic matter. When it is inconvenient, you can also use a little slow-release granular fertilizer instead. Planting soil should not be layered, coarse, medium and fine can be mixed together.

A volcanic sand, used in combination with other substrates, contains a large amount of iron oxide. Advantages: strong permeability and good drainage. Mixed use of river sand, garden soil, etc.

Baidu encyclopedia-tongshengsha