RHP manages the quality marks RHP (for substrates, growing media, potting soils) and RAG (for green roof substrates, soil supply and soil improving materials). RHP optimises and assures the quality of these certified products. Products with the RHP quality mark are stable and increase the opportunity of an optimal nutrient medium significant.
The quality marks stand for:
- Safe. The whole chain, from the production process through the user, is controlled.
- Clean. RHP certified substrates are carefully produced and intensively checked to see whether they are phytosanitary clean, so free of harmful organisms and diseases.