EU and USDA organic certification bars synthetic fertiliser entirely. Many star anise growers struggle through transition for lack of workable replacement schedules.

Seasonal schedule

Early dry season (Nov–Dec)

  • Composted manure 20–25 kg/tree.
  • Trichoderma microbial inoculant 1 kg/tree.

Pre-flowering (Mar–Apr)

  • Fermented soybean meal 5 kg/tree.
  • Wood ash 3 kg/tree for natural potassium.

Post-harvest (Sep–Oct)

  1. Pressed green manure 10 kg/tree.
  2. Fish-bone meal 500 g/tree for slow-release phosphorus.

“The 24-month transition trims yield 10–15%, but organic prices run 60–80% higher.”
— Bắc Hà Organic Star Anise Cooperative