# Biodynamic Oak Bark Preparation -Quercus alba - (BD 505) Compost Preparation

### One unit is 1 heaping teaspoon.

## At a Glance:

What it does:  
Regulates calcium processes and supports healing within the soil and compost.

**How to use:**  
Use the finished preparation as part of a complete BD 502–507 set. Make six holes evenly across the compost pile and place this unit into one of the first five holes, about halfway down the pile. Close the hole with old compost or good soil so no air pocket remains. One complete set treats up to 15 tons of compost; use the full set on smaller piles also.

Ingredients:  
Oak bark (_Quercus alba_).

🌳 [Learn More about BD505 Oak bark](https://go.jpibd.org/guide-bd-505 "BD505 Oak Bark: The Center of Intelligence in the Compost")

## Product Details:

**For complete application directions, visit: [BD 502–507 Detailed Usage Instructions](https://go.jpibd.org/instructions-bd-502-507)**

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

## Details

- **Price:** 6.79 USD
- **Vendor:** The Josephine Porter Institute
- **Type:** Compost Preparations
- **Tags:** Biodynamic Preparations and Compost, Compost Preparations, farming, gardening, orcharding

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 6.79 USD | In stock |

## Images

- Biodynamic Oak Bark Preparation -Quercus alba - (BD 505) Compost Preparation - The Josephine Porter Institute
- Biodynamic Oak Bark Preparation -Quercus alba - (BD 505) Compost Preparation - The Josephine Porter Institute
- Biodynamic Oak Bark Preparation -Quercus alba - (BD 505) Compost Preparation - The Josephine Porter Institute

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> Source: [The Josephine Porter Institute](https://www.jpibiodynamics.org/products/biodynamic-oak-bark-bd505-compost)
> Updated: 2026-08-10