The Gütegemeinschaft Substrate für Pflanzen e.V. (GGS) has 35 years experience as recognized centre for RAL quality assurances for the following product groups:
- Bark (bark mulch, composted bark)
- Growing media
- Potting soil
- Growing media constituents (wood-fibres, coir products, peat, perlite)
- Expanded clay as growing media
- Substrates for green roofs
- Substrates for tree planting
GGS quality assurance incorporates the latest developments in science and technology thanks to its ongoing communications and close collaboration with a wide variety of scientists in research and industry. GGS is involved in many research projects on substrates and also brings in scientific expertise in shaping of general regulatory framework.
More than 55 members, well-known names in the substrate industry in Germany and overseas, have their products under a continuous and neutral quality assurance with third-party and self-monitoring.
Complience with the strict quality standards is documented by the quality mark ‘Substrate für Pflanzen’.