Division PFC 4: GROWING MEDIUM

The following parameters shall be declared in the following order:

• electrical conductivity given as mS/m, except for mineral wool;

• pH;

• quantity:

  • for mineral wool, expressed as number of pieces and the three dimensions length, height, and width;

  • for other pre-shaped growing media, expressed as size in at least two dimensions;

  • for other growing media, expressed as total volume;

  • except for pre-shaped growing media, quantity expressed as volume of materials with a particle size greater than 60 mm, when present;

• nitrogen (N) extractable by CaCl₂/DTPA (calcium chloride/ diethylenetriaminepentaacetic acid; ‘CAT-soluble’), if above 150 mg/l;

• phosphorus pentoxide (P₂O₅) extractable by CaCl₂/DTPA (calcium chloride/ diethylenetriaminepentaacetic acid; ‘CAT-soluble’), if above 20 mg/l;

• potassium oxide (K₂O) extractable by CaCl₂/DTPA (calcium chloride/ diethylenetriaminepentaacetic acid; ‘CAT-soluble’), if above 150 mg/l;

• production date.