Shi Lan Shi Lan, also known as scorched earth or volcanic swelling stone, is often used to grow orchids. It has good air permeability and water retention, and is rich in potassium.
Shimi Shimi is a natural stone, which is processed into peanuts and soybeans. These granular substrates are generally called alkaline, which should be washed with clean water before use and used as fixing and decorative materials for hydroponic flowers.
In addition to plants with unsightly roots and plants that need to be fixed, hydroponics of newly planted woody plants and palm plants with granular substrates is also quite interesting and lovely.