4 july 2025
RHP has published a factsheet about heavy metals in growing media. This factsheet is part of a series on specific topics related to potting soil and growing media.
The factsheet on heavy metals can be found in the knowledge base of RHP. It is intended to inform certified companies, their customers, and other stakeholders about heavy metals in raw materials and substrates for soil-based applications, like in public spaces, and for cultures in pots or containers. The factsheet covers the existing legislation, the requirements of the RHP and RAG quality marks in this area, and what users should take into account.
About once a quarter, a new factsheet will be added to the knowledge base. Topics that are planned next are, for example: unfertilized potting soil, (liver) moss, microplastics and PFAS.
