# Supercharged Biodynamic Horn Manure Preparation (BD 500) BD Spray Preparation plus Valerian (507)

**BD500 horn manure will be BACK IN STOCK online mid-May.**

Steiner's original indications suggest as many as 9 units per acre. Our current rate, which is based on the Agriculture Circle's attempt to find the minimum threshold effects, is 1 unit per acre. This is enough for a baseline effect, but many of us have had great success using more than this. 

Ideally, 500 horn manure is stirred _together with_ 507 especially just before cultivating the soil. The important part is combining these. Virtually all the best results with biodynamics combine the preparations with the use of 507 Valerian as a _soil spray_.  
  
Regular Strength: 1 unit per acre + 1 unit 507  
Medium Strength: 2x units per acre + 1 unit 507  
Full Strength: 3x units per acre + 1 unit 507

[Learn more about the imporance of using 507 as a soil spray.](https://jpibiodynamics.substack.com/p/fanning-the-flame-of-life-with-biodynamics)

## Details

- **Price:** 11.54 USD - 41.12 USD
- **Vendor:** The Josephine Porter Institute
- **Tags:** BD Spray, Biodynamic, Biodynamic Horn Manure Preparation (BD 500) BD Spray Preparation + Valerian (BD507), Horn Manure, Preparation, Spray Preparation, Valerian

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| 500 regular / Regular Strength / +Valerian | 18.04 USD | In stock |
| 500 regular / Regular Strength / no-Valerian | 11.54 USD | In stock |
| 500 regular / Medium Strength / +Valerian | 29.58 USD | In stock |
| 500 regular / Medium Strength / no-Valerian | 23.08 USD | In stock |
| 500 regular / Full Strength / +Valerian | 41.12 USD | In stock |
| 500 regular / Full Strength / no-Valerian | 34.62 USD | In stock |
| 500X prepotentized / Regular Strength / +Valerian | 18.04 USD | In stock |
| 500X prepotentized / Regular Strength / no-Valerian | 11.54 USD | In stock |
| 500X prepotentized / Medium Strength / +Valerian | 29.58 USD | In stock |
| 500X prepotentized / Medium Strength / no-Valerian | 23.08 USD | In stock |
| 500X prepotentized / Full Strength / +Valerian | 41.12 USD | In stock |
| 500X prepotentized / Full Strength / no-Valerian | 34.62 USD | In stock |

## Images

- Supercharged Biodynamic Horn Manure Preparation (BD 500) BD Spray Preparation plus Valerian (507) - The Josephine Porter Institute
- Supercharged Biodynamic Horn Manure Preparation (BD 500) BD Spray Preparation plus Valerian (507) - The Josephine Porter Institute

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> Source: [The Josephine Porter Institute](https://www.jpibiodynamics.org/products/biodynamic-horn-manure-bd500-bd507)
> Updated: 2026-08-10