Variety: Silphium perfoliatum “Biomix 2024”, EU-certified seeds.
Sowing rate: 2.5 kg/ha pure, 3 kg/ha underseeded maize
Seeds/kg: ≈ 48,500 units (PMG ≈ 20 g)
Row: 35-40 cm (pneumatic drill, double disc).
Intra-row spacing: 10-15 cm (3-4 plants/m²).
Depth: 1-2 cm, reconsolidated soil.
Sowing window: April 20-May 31, soil ≥ 10 °C
Recommended equipment: pneumatic precision seed drill (Monosem NG-Plus, GVB520 or equivalent), “small cell” plates for unit dose.
Seedbed: fine and firm; post-sowing roller to guarantee seed/soil contact.
Starter fertilization: 40 kg N + 30 kg P₂O₅ + 60 kg K₂O/ha at sowing.
Target yield: 14-22 t DM/ha from year 2 (biogas ≈6,000-8,000 Nm³/ha)
Life span: > 15 years, no annual sowing.
Packaging: 3 kg kraft bag (32×42 cm), shelf life 36 months at 10°C/HR < 60%.