Growing media are a mixture of a large variety of substrate constituents, such as peat, clay, bark humus, wood fibre, substrate compost and numerous other mineral and organic elements. Horticulturists today normally use standardised substrates from industrial production. They place very high requirements on the substrates they use. Here\u2019s why:<\/p>\n
These requirements call for uniform, all-season high-quality substrates.<\/p>\n
RAL Quality Assurance guarantees just that. It stipulates that quality control already starts when purchasing feedstock. To this end, substrate producers must inspect their constituents and additives for compliance with defined parameters and document the results. G\u00fctegemeinschaft Substrate f\u00fcr Pflanzen e.V. (GGS) monitors the producers\u2019 compliance with this requirement. In an additional step, the mixed growing media are inspected both internally by the production facility and externally by GGS.<\/p>\n
As growers develop their own methods of crop management, they increasingly require customised substrate mixes. Substrate producers are definitely geared up to suit these requirements. And since RAL Quality Assurance applies to all types of growing media produced at a specific facility, the concept also covers these special-purpose mixes.<\/p>\n<\/div><\/div><\/div>