Comparative table of different mineral substrates
All rocks add drainage to the potting soil you use. Unlike sand, they improve soil aeration and prevent compaction.
Pumice stone
Mixed with potting soil (medium) or used to decorate the top of pots (small) Captures fertilizer Neutral or very slightly alkaline. Cacti, succulents, hoyas, lithops, bonsais
Red Lava
Mixed with potting soil (medium) or used to decorate the top of pots (small) Absorbs fertilizer.neutral or very slightly alkaline Cacti, succulents, hoyas, lithops, bonsais
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 as the soil becomes drier. pH neutral, helps maintain the pH of its environment neutral thanks to its buffering effect.
Chabasai
Highly porous, it can store up to 40% of its weight in water. Does not disintegrate. Contains potassium, magnesium, calcium and iron. PH neutral, helps maintain the pH of its environment neutral thanks to its buffering effect.
Kyriu
Rich in iron, recommended for slow-growing bonsais as it does not disintegrate easily and lasts for several years. No absorption. Slightly acidic pH: 6.5 Use in combination with akadama for bonsai .
Kanuma
Because of its light, well-drained, acidic nature, Kanuma is ideal for creating a favorable growing environment for the delicate roots of bonsai trees . Acidifies the soil, good for growing bonsai and other acid-loving plants. pH between 4.5 and 5.5.
Akadama Iwamoto
Retains water and nutrients well for sensitive bonsai roots. Fired, 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. Greyer, sun-dried and therefore slightly softer. Neutral to slightly acidic PH between 6.5 and 6.8 Bonsais
Akadama Jirushi
Retains water and nutrients well for sensitive bonsai roots. Fired, therefore harder and degrades less quickly. Neutral to slightly acidic PH between 6.5 and 6.8 Lithops
In bold = In our house blends