Biodynamic Preparation Recipes (BD 500–508)
Biodynamic Preparation Recipes (BD 500–508)
Biodynamic preparations are the heart of biodynamic farming. They are made in small batches using natural materials and specific fermentation processes, then used in tiny amounts (homeopathic doses) to vitalize soil, plants, and compost. The recipes below are the classic Steiner methods, adapted for practical use (including cannabis). Always follow local regulations, use clean tools, and source high-quality materials.
Safety Note: Wear gloves and masks when handling powders or during stirring. Work in harmony with a biodynamic calendar for best results.
1. BD 500 – Horn Manure (Soil Activator)
Purpose: Stimulates root growth, microbial life, and humus formation. Ingredients (for one set of horns):
- Fresh cow manure (from a lactating cow if possible)
- Cow horns (female preferred)
Recipe & Process:
- Fill clean cow horns firmly with fresh manure (no air pockets).
- Bury horns point-down in a prepared pit (45–75 cm deep) in fertile soil during autumn (around September/October). Cover with soil and leave over winter.
- Dig up in spring (March/April). The manure should be dark, crumbly, and earthy-smelling.
- Store in a cool, dark place in a breathable container.
Application (Dynamization): Stir 20–60g in 10–15 liters of warm rainwater vigorously for 1 hour (create vortex, alternate directions). Spray on soil in spring and fall.
2. BD 501 – Horn Silica (Light & Quality Enhancer)
Purpose: Strengthens photosynthesis, improves terpene expression, flavor, aroma, and resilience (excellent for cannabis flower quality). Ingredients:
- Clear quartz crystals (finely ground silica powder)
- Cow horns
Recipe & Process:
- Grind quartz into a fine powder.
- Moisten to a stiff paste with a little water.
- Fill cow horns and bury point-up during spring/summer (March/April to September).
- Dig up in autumn. The preparation is a fine, powdery silica.
Application: Stir a small amount (pea-sized per acre) in water for 1 hour at sunrise. Spray as a fine mist on plant leaves during growth and before harvest.
3–8. Compost Preparations (BD 502–507)
These are added to compost piles to enliven them. Each is made from a specific plant:
| Prep | Plant Material | How to Make (Summary) | Purpose |
|---|---|---|---|
| 502 | Yarrow flowers | Stuff into stag bladder, hang in sun, bury over winter | Potassium & sulfur balance |
| 503 | Chamomile flowers | Stuff into cow intestine, bury over winter | Calcium & stability |
| 504 | Stinging nettle (whole plant) | Bury in soil for 1 year | Nitrogen & vitality |
| 505 | Oak bark | Stuff into animal skull or barrel, bury in wet area | Calcium & disease resistance |
| 506 | Dandelion flowers | Stuff into mesentery (peritoneum), bury over winter | Silica & light forces |
| 507 | Valerian flowers | Juice pressed and stored | Phosphorus & warmth |
Usage: Add small amounts (1–2g each per ton of compost) to compost piles.
9. BD 508 – Horsetail (Equisetum) Tea/Ferment
Purpose: Prevents fungal diseases, regulates water balance (useful for powdery mildew in cannabis). Recipe:
- 50–100g fresh or 25g dried horsetail (Equisetum arvense) per liter of rainwater.
- Simmer 20–60 minutes, cool, and strain. For fermented version: Let sit 10–14 days until it smells slightly sulfurous.
Application: Dilute and spray as foliar or soil treatment during humid conditions.
Application Tips for Cannabis Growers
- Start with BD 500 on soil in spring/fall and BD 501 on plants during growth.
- Stir preparations dynamically (1 hour vortex stirring) before use.
- Combine with regenerative practices (no-till, compost, cover crops).
- Many craft cannabis growers report richer terpenes and anthocyanins (purple strains) with these methods.
These preparations require patience and observation but produce exceptional results. Many small-scale and regenerative cannabis farms use them successfully.
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