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Bonsai soil mix
Akadama, pumice, and lava rock blend for fine root control.
Granular, inorganic-heavypH 5.5–6.5
Drainage
Excellent
Water retention
Low — controlled moisture
Best plants
Bonsai, miniature trees, shallow containers
Pros
Superior drainage and root pruning response, stable structure, precise watering
Cons
Expensive, dries quickly, requires skill to balance water and fertilizer
Amendments
Repot and refresh substrate every 2–3 years