Proof of RAL quality assurance for bulk/unpackaged shipments
If you want to make sure bidders actually offer RAL-certified products, you should choose to use the following wording in your invitations for tender:
Tips for tendering – RAL-certified bark humus
Bark humus carrying the RAL ”Substrates for Plants“ quality mark RAL GZ 250/1-2, particle size: < 20 mm
The supplier must provide evidence that the production site delivering the bark mulch carries the ”Substrates for Plants” quality mark RAL GZ 250/1-2 (bark humus).