All rocks add drainage to the potting soil you are using. They improve soil aeration and avoid compaction, unlike sand.
Pumice stone
Mixed with potting soil (medium) or as a decoration on the top of pots (small) Captures neutral or very slightly alkaline fertilizer. Cacti, succulents, hoyas, lithops, bonsai
Red lava
Mixed with potting soil (medium) or as a decoration on the top of pots (small) Captures fertilizer. Neutral or very slightly alkaline Cactus, succulents, hoyas, lithops, bonsai
Black lava
Like red lava, rich in minerals such as iron, magnesium and calcium. Slightly Alkaline Bonsai
Zeolite
Has the ability to absorb water and nutrients, then gradually release them to plants when the soil becomes drier. Neutral pH, helps maintain the pH of its neutral environment thanks to its buffering effect
Chabasai
Very porous, it can store up to 40% of its weight in water. It doesn't fall apart. Contains potassium, magnesium, calcium and iron. Neutral pH, helps maintain the pH of its neutral environment thanks to its buffering effect
Kyriu
Rich in iron, recommended for slow-growing bonsais because it does not disintegrate easily and lasts several years. No absorption. Slightly acidic pH: 6.5 To be used combined with akadama for Bonsai
Kanuma
Due to its light, well-drained and acidic nature, Kanuma is ideal for creating a favorable growing environment for the delicate roots of Bonsai Trees. Acidifies soil, good for growing Bonsai trees and other acid-loving plants. pH between 4.5 and 5.5
Akadama Iwamoto
Holds water and nutrients well for sensitive bonsai roots. Cooked, therefore harder and degrades less quickly, beige. Neutral to slightly acidic pH between 6.5 and 6.8
Akadama Ibaraki
Holds water and nutrients well for sensitive bonsai roots. grayer, dried in the sun and therefore a little less hard. Neutral to slightly acidic pH between 6.5 and 6.8 Bonsai
Akadama Jirushi
Holds water and nutrients well for sensitive bonsai roots. cooked, therefore harder and deteriorates less quickly. Neutral to slightly acidic pH between 6.5 and 6.8 Lithops
In bold = In our house blends
