• Biodynamic Pfeiffer™ Field and Garden Spray - The Josephine Porter Institute
  • Biodynamic Pfeiffer™ Field and Garden Spray - The Josephine Porter Institute
  • Pfeiffer Biodynamic Field and Garden Spray package on a clean studio background
  • Pfeiffer Biodynamic Field and Garden Spray package in a garden setting
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The Josephine Porter Institute

Biodynamic Pfeiffer™ Field and Garden Spray

Biodynamic Pfeiffer™ Field and Garden Spray

$31.16 USD
$31.94 USD $31.16 USD
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Description

One unit is 2 ounces.
One unit treats up to 1 acre.

At a glance:

What it does:
Supports soil life and field vitality, especially on land that hasn’t yet received regular BD 500 and BD 501. Useful for farms beginning biodynamic work or those needing extra help restoring balance.

How to use:
Moisten one unit in a flat pan or dish with just enough water to make it pasty. Allow it to activate for 12–16 hours or overnight. Dilute the paste in the amount of water your sprayer is calibrated to apply over one acre. Spray close to the soil during the latter part of the day on a calm day.

Ingredients:
Dried blend containing BD 500 Horn Manure and BD 502–507 Compost Preparations, plus beneficial soil organisms and other agents.

🌾 Learn More about Pfeiffer Field and Garden Spray

Product Details:

Among our most popular selling items, Pfeiffer™ products were originated in the 1940’s by Dr. Ehrenfried Pfeiffer with the purpose of helping to make biodynamics more accessible to home gardeners, conventional farmers, and composters. JPI is the exclusive owner of these proprietary formulas.

Published grower accounts describe Pfeiffer Field and Garden Spray in vineyard practice. Explore the reported results and conditions of use, alongside historical experiments and detailed source notes.

The Pfeiffer™ Biodynamic (BD) Field & Garden Spray contains all components included in the Compost Starter plus additional amount of BD 500. Use when planting or transplanting to stimulate germination and root growth and when turning in cover crops to increase soil microorganisms that aid in decomposition and transformation to stable humus. It may also be used on houseplants or as a bath for seeds and bulbs, as described in the handout. One unit may be divided to treat smaller areas. It is an excellent treatment for gardens, pasture, and hayfields of all sizes.

Composition of the Pfeiffer™ BD Field and Garden Spray
This potent spray contains the biodynamic agricultural preparations BD #500, #502, #503, #504, #505, #506, and #507, which give this product its unique effectiveness. It stimulates and attracts a full range of soil micro-flora and fauna beneficial to accelerate the breakdown of organic matter without tying down nitrogen or other delaying actions. Following such breakdown there is a subsequent build up into helpful humus compounds. Properly activated for use, each ounce can yield more than 5.6 billion CFU’s (colony forming units) of beneficial organisms.

Benefits of the Pfeiffer™ BD Field and Garden Spray
The BD Field ; Garden Spray aids humus formation in organic materials already in the topsoil. It should be used when planting and transplanting to stimulate germination and root growth, and when turning in cover crops to aid the transformation of organic materials into humus.

One unit of BD Field & Garden Spray treats one acre of land. It comes in single or multiple units but one unit is the smallest quantity we can ship. If your garden is less than one acre, activate only 1 level teaspoon (1 tsp.). This will give coverage for 1,000 square feet. Activation of 1 level tablespoon (1 Tbsp.) will cover 3,000 square feet.

Pfeiffer Field & Garden Spray Detailed Usage Instructions: English | Chinese

Please note: Quantities over 1 may be bagged together.

Learn more: Pfeiffer Field & Garden Spray guide

Published results & grower experience

Bring biodynamic preparations into your soil and field management.

Pfeiffer Field and Garden Spray is formulated for soil and field applications, including work with incorporated crop residues. Published vineyard accounts offer a practical example of its use alongside cover-crop management.1, 5, 6

The Grgich Hills experience

In a published interview, Ivo Jeramaz described a comparison begun in 2007 with fifty treated acres and a fifty-acre control. Juice nitrogen in five of six treated blocks reportedly rose from approximately 150 ppm the previous year to 200 ppm after Field and Garden Spray use.5

A later account identifies the measure as yeast-assimilable nitrogen (YAN) and reports no increase in the untreated blocks. YAN describes nitrogen available to yeast in grape juice. These are published grower accounts of a commercial comparison; they do not supply a randomized statistical analysis.6

A grower's recommendation

Jeramaz's interview, published in Winter 2010-2011, includes this recommendation:

Nonetheless, I would highly recommend it where possible, especially if you have good moisture and good cover crops.5

Moisture and management mattered. The interview reports little improvement in dry 2008 and later discontinuation because of application logistics. The 2015 account describes dry-year exceptions and eventually reducing annual application when YAN became too high for the wine being made. The accounts differ in their follow-up chronology.5, 6

Put the experience to work

Follow the current product instructions for preparation, coverage and application timing. Record your cover crop, soil conditions and application date so that the reported experiences can inform your own observations.12

Sources for this product section
  1. Josephine Porter Institute, current product descriptions: Biodynamic Pfeiffer Compost Starter and Pfeiffer Field and Garden Spray. Consulted September 27, 2026. These identify current products and intended applications; the historical comparisons are documented separately below.
  2. Hunter Francis, "Biodynamics Taking Root in the Legendary Napa Valley," interview with Ivo Jeramaz, Applied Biodynamics 71 (Winter 2010-2011), p. 5. Vineyard comparison, follow-up conditions and recommendation.
  3. Abigail Porter, compiler, "Anecdotes: Pfeiffer Biodynamic Field and Garden Spray," Applied Biodynamics 87 (Spring/Summer 2015), p. 17. Vineyard account attributed to Joseph Brinkley's experience. Its phrase "50 mg" lacks a denominator; the surrounding discussion uses mg/l. The numerical table in this guide uses the 150-to-200 ppm values in reference 5.
  4. Josephine Porter Institute, Pfeiffer Compost Starter instructions, Field and Garden Spray instructions, and preparation-instructions directory. Consulted September 27, 2026. Use the current instructions supplied for the product being applied.
Explore the full references and study context →

Frequently Asked Questions

How do I use the Biodynamic Pfeiffer™ Field and Garden Spray?

Moisten one 2-ounce unit with just enough water to make a paste and let it activate for 12–16 hours or overnight. Dilute it in the amount of water your sprayer needs to cover one acre; spray close to the ground on a calm day in the latter part of the day. Clean spray equipment first.
What is included in the Biodynamic Pfeiffer™ Field and Garden Spray?

The dry blend contains BD 500 Horn Manure, BD 502–507 compost preparations, beneficial soil organisms, and other agents. It is intended for biodynamic field and garden soil treatment.
How much area does one unit of the Pfeiffer™ Spray cover?

One 2-ounce unit covers one acre. For a smaller area, activate 1 level teaspoon per 1,000 square feet or 1 level tablespoon per 3,000 square feet; use enough carrier water for even coverage.
Where can Pfeiffer Field & Garden Spray be used?

JPI uses this spray to support living soil in gardens, fields, pasture, and hayfields, including land beginning biodynamic care. Current instructions also describe houseplant and seed-or-bulb bath applications. Follow the directions for each use so the preparation is activated, diluted, and applied appropriately.