Mix Horticultural Roccia lavica Ciottoli Pomice Terriccio Bonsai Rocce decorative granulose Ghiaia Roccia vulcanica per il drenaggio Cactus succulente Terrario Fata Giardinaggio Pianta Top Dressing

Mix Horticultural Lava is commonly used in bonsai as an additive to soils. While lava would be a pretty good medium to promote tree growth by itself as it drains very well and retains a large amount of moisture it is best to use it in a mix. Black lava will also help prevent soil compaction in your mix and give it some structure.