250 ml - Bio Rhizotonic - Organic Rooting Stimulator - OMRI Listed - BIOCANNA 9920025 BioRHIZOTONIC is an organically certified root stimulator (OMRI). BioRHIZOTONIC contains a range of vitamins, including vitamins B1 and B2. It stimulates the development of root (hairs), root tips and increases the plant's resistance. A powerful root system ensures that the plant can absorb more nutrients and grows faster. BioRHIZOTONIC has a noticeably vitalizing effect on plants