# Biodynamic Horn Manure Preparation (BD 500) — Spray Preparation

## At a Glance:

### One unit is 1/4 cup.  
One unit treats one acre.

**What it does:**  
Vitalizes the soil and stimulates root growth. Builds humus, enlivens soil microbial life, and helps ground the plant in the forces of growth and reproduction.

**How to use:**  
Stir one unit for one hour in 3 gallons of lukewarm rainwater or other chemical-free water, ideally in the late afternoon. Spray immediately on moist soil, not on foliage. Best applied in spring and fall, and before planting or transplanting.

**Ingredients:**  
Cow manure

### 🌱 [Learn More about BD 500 Horn Manure](https://go.jpibd.org/guide-bd-500 "BD500 Horn Manure: Nourishing the Soil with Cosmic Cow Wisdom")

## Product Details:

BD 500 stimulates seed germination, root growth, and humus formation. Use when planting, transplanting or turning in cover crops.

**How to use BD 500**  
  
Stir one unit for one full hour in 3 gallons of lukewarm rainwater or other chemical-free water. During the last 20 minutes, add one unit of BD 507 per acre for best results. Spray immediately after stirring, during the latter part of the day, directly on moist soil. Part portions may be used for smaller areas, keeping the same proportions and stirring for the full hour.

**Variant note:** The current BD 500 handout provides the standard application directions shown above. For questions specific to the prepotentized 500X option, contact JPI before application.

* * *

**BD 500 Detailed Usage Instructions: [English](https://go.jpibd.org/instructions-bd-500) | [Spanish](/pages/making-using-bd-preps#spanish500) | [Chinese](/pages/making-using-bd-preps#chinese500)** 

**Additional Article: [BD 500: Reflections on Making BD 500](https://cdn.shopify.com/s/files/1/0017/4473/2221/files/BD-500-Reflections-on-Making-BD-500-AB-1995.pdf?11510486555095028812)**

**Please note: Quantities over 1 may be bagged together.**

## At a Glance:

### One unit is 1/4 cup.  
One unit treats one acre.

**What it does:**  
Vitalizes the soil and stimulates root growth. Builds humus, enlivens soil microbial life, and helps ground the plant in the forces of growth and reproduction.

**How to use:**  
Stir one unit for one hour in 3 gallons of lukewarm rainwater or other chemical-free water, ideally in the late afternoon. Spray immediately on moist soil, not on foliage. Best applied in spring and fall, and before planting or transplanting.

**Ingredients:**  
Cow manure

### 🌱 [Learn More about BD 500 Horn Manure](https://go.jpibd.org/guide-bd-500 "BD500 Horn Manure: Nourishing the Soil with Cosmic Cow Wisdom")

## Product Details:

BD 500 stimulates seed germination, root growth, and humus formation. Use when planting, transplanting or turning in cover crops.

**How to use BD 500**  
  
Stir one unit for one full hour in 3 gallons of lukewarm rainwater or other chemical-free water. During the last 20 minutes, add one unit of BD 507 per acre for best results. Spray immediately after stirring, during the latter part of the day, directly on moist soil. Part portions may be used for smaller areas, keeping the same proportions and stirring for the full hour.

**Variant note:** The current BD 500 handout provides the standard application directions shown above. For questions specific to the prepotentized 500X option, contact JPI before application.

* * *

**BD 500 Detailed Usage Instructions: [English](https://go.jpibd.org/instructions-bd-500) | [Spanish](/pages/making-using-bd-preps#spanish500) | [Chinese](/pages/making-using-bd-preps#chinese500)** 

**Additional Article: [BD 500: Reflections on Making BD 500](https://cdn.shopify.com/s/files/1/0017/4473/2221/files/BD-500-Reflections-on-Making-BD-500-AB-1995.pdf?11510486555095028812)**

**Please note: Quantities over 1 may be bagged together.**

## Details

- **Price:** 12.35 USD - 550.0 USD
- **Vendor:** The Josephine Porter Institute
- **Type:** Spray Preparations
- **Tags:** bee keeping, Biodynamic Preparations and Compost, farming, gardening, orchard, soil remedies, Spray Preparations, vineyards

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| 1 unit / 500 regular | 12.35 USD | In stock |
| 1 unit / 500X prepotentized | 12.35 USD | In stock |
| 50 unit / 500 regular | 550.00 USD | In stock |
| 50 unit / 500X prepotentized | 550.00 USD | In stock |

## Images

- Biodynamic Horn Manure Preparation (BD 500) BD Spray Preparation - The Josephine Porter Institute
- Biodynamic Horn Manure Preparation (BD 500) BD Spray Preparation - The Josephine Porter Institute

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