Apply biodynamic farming to your land. Use when the user asks about BD preparations, horn manure, horn silica, the biodynamic calendar, root/flower/fruit/leaf days, Steiner farming, farm organism, Demeter certification, or transitioning from organic to biodynamic.
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s4ag-biodynamic
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Apply biodynamic farming to your land. Use when the user asks about BD preparations, horn manure, horn silica, the biodynamic calendar, root/flower/fruit/leaf days, Steiner farming, farm organism, Demeter certification, or transitioning from organic to biodynamic.
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Biodynamic
Biodynamic farming treats the farm as a self-sustaining organism — a closed loop of soil, plant, animal, and cosmos that generates its own fertility and resilience when correctly managed. The nine preparations (500–508) are the primary tools: each either activates soil biology, drives composting, or regulates specific plant and soil processes. The biodynamic calendar provides the timing framework — matching cultivation, sowing, harvesting, and processing to lunar and stellar rhythms that have shown consistent effects on germination, fermentation, and storage quality.
Your goal is to farm in a way that builds self-sufficiency: reducing purchased inputs, developing on-farm fertility, and producing food of high nutritional and keeping quality. This skill gives you the practical framework for that — starting where you are, whether you are organic, conventional, or already partially biodynamic.
How this skill works: Each sub-tool pauses at a Checkpoint to confirm the assumptions it is about to build on before producing output. A recommendation built on a wrong assumption wastes time and money — confirm the checkpoint before acting. Each sub-tool ends with Next steps — the skills worth running once you have acted on this one.
Expert Lineage
The thinkers whose frameworks underpin this skill — and what they specifically discovered that changes how you farm.
Rudolf Steiner — The Agriculture Course (1924)
Eight lectures delivered at Koberwitz in June 1924 at the request of farmers who were observing declining seed quality, animal health, and soil vitality in the decades after chemical agriculture began. Steiner's central finding: the farm is a living individuality, and inputs drawn from outside that individuality (purchased fertility, external seed, synthetic chemistry) progressively weaken it. The preparations are designed to restore the farm's capacity to regulate itself — to generate its own nutrition, resist its own pests, and produce seed of full vitality. The practical implication: the direction of travel is always toward greater farm self-sufficiency, even if current practice requires external inputs.
Maria and Matthias Thun — 40 Years of Calendar Research
Maria Thun's sowing experiments from the 1950s through the 1990s demonstrated that germination rates, yield, and quality vary systematically with the position of the Moon relative to the zodiac constellations. Root days (Moon in earth signs) produce better root crops; flower days (Moon in air signs) produce better flowering crops and honey; fruit days (Moon in fire signs) produce better fruiting crops and seed; leaf days (Moon in water signs) produce better leaf crops but poorer seed vitality. Her specific and actionable contribution: the annual Biodynamic Sowing and Planting Calendar, which translates this into a daily guide. The practical implication: harvesting for keeping quality should be done on fruit or root days; harvesting for immediate consumption can follow any favourable day.
Ehrenfried Pfeiffer — Laboratory to Farm
Steiner's student and closest scientific collaborator. Pfeiffer developed the copper chloride crystallisation method for assessing the formative forces in food and plant material — one of the few tools that discriminates biodynamic from organic from conventional produce in a way that standard chemical analysis cannot detect. His most practically important contribution was demonstrating that Preparation 500 (horn manure) reliably stimulates earthworm populations, root development, and humus formation when correctly applied — establishing the biological mechanism behind what Steiner had described cosmologically. The practical implication: 500 is not ceremonial; it is a soil biology intervention with documented effects on the food web.
Hugh Lovel — Quantum Agriculture and Broadcast Preparations
Lovel developed the field broadcast method for preparations — applying them over large areas using a broadcast sprayer rather than hand-applied at standard BD dilution rates — and extended Steiner's framework into what he calls quantum agriculture, which integrates preparation use with landscape design and cosmic forces. His most actionable contribution for practical farmers: the preparation quality matters more than precise timing, and preparations made under poor conditions (rushed stirring, incorrect materials) are less effective than carefully made preparations applied slightly off the ideal calendar window. The practical implication: make preparations well before worrying about optimising application timing.
Nikolaus Remer — Living Farmyard, Living Manure
Remer's research focused on the composting preparations (502–507) and demonstrated measurable differences in nitrogen retention, humus formation, and compost temperature curves in piles treated with preparations versus untreated piles. His key finding: preparations 502–507 reduce nitrogen loss during composting by 20–30% compared to untreated piles of identical composition, and the resulting compost has a higher fungi-to-bacteria ratio — exactly what Ingham would predict as ideal for most farming systems. The practical implication: if you are making compost and doing nothing else biodynamic, adding the composting preparations is a low-cost, high-return starting point.
Which tool fits
You need to...
Tool
Understand what each preparation does and how to use it
preparations
Use the biodynamic calendar for planning sowing, harvest, or processing
calendar
Design your farm as a self-sufficient organism
farm-organism
Move from organic or conventional toward biodynamic
transition
Routing Decision
New to biodynamics — where do I start? → transition
Have preparations, unsure how to use them → preparations
Want to plan sowing or harvest dates → calendar
Planning the farm system as a whole → farm-organism
Already using some preparations, want to go deeper → farm-organism or preparations depending on the gap
Preparations
What each preparation is, how to make it, when and how to apply it.
The nine biodynamic preparations divide into three functional groups: the two field sprays (500 and 501), the six composting preparations (502–507), and the supplementary spray preparation (508). Each serves a different function. Begin with 500 — it is the most universally applicable, lowest-risk, and most biologically documented preparation in the suite.
Fill a cow horn with mature cow manure (firm, not sloppy; no synthetic additives). The horn must come from a horned (not polled) cow. Pack tightly, seal with clay or soil, and bury over winter (around October, retrieve around April in the northern hemisphere) at 40–60cm depth in biologically active soil.
Application rate: 25–40g of recovered material per acre (60–100g/ha).
Stirring: stirring is the critical step. Add the material to lukewarm water (35–38°C, never hot), stir vigorously in one direction until a deep vortex forms, then reverse direction quickly and stir the other way. Alternate for one continuous hour. The stirring creates rhythmic alternation between chaos and order that is believed to potentise the preparation.
Apply in evening (the soil is opening as temperature drops) as a fine spray on moist soil. Aim for soil coverage, not plant coverage.
Apply in spring before growth and in autumn after main crops — two primary applications per year minimum.
501 — How to make and apply:
Fill a cow horn with finely powdered quartz (rock crystal ground to a fine flour). Pack tightly, bury over summer (May–October in northern hemisphere).
Application rate: 1g per acre (2.5g/ha) — minute quantities.
Stirring: same method as 500, one full hour.
Apply in early morning as a fine mist over growing plant material (not soil). The sun activates it throughout the day.
Use during the main growing phase — especially useful on crops where flavour, colour, and keeping quality are primary goals. Do not use on seedlings or newly transplanted plants.
Composting Preparations (502–507)
These six preparations are inserted into compost heaps or manure piles to guide the decomposition process. They are each made from medicinal plants, typically fermented inside animal organs that enhance their specific qualities.
Preparation
Plant
Organ/Container
Function in Compost
502
Yarrow (Achillea millefolium)
Stag's bladder
Regulates sulphur and potassium; connects cosmic nitrogen fixing
Phosphorus stimulation; warmth regulation in the pile
How to apply composting preparations:
Insert 502–506 (solid) into holes approximately 50cm deep in the compost pile — one hole per preparation, distributed across the pile.
Dilute 507 (liquid) in lukewarm water, stir briefly, and pour over the entire surface of the pile.
Do this once when building the pile; a second application when turning is optional.
The preparations regulate decomposition from within — do not expect dramatic visible changes; the results appear in the finished compost quality.
508 — Horsetail (Equisetum arvense)
Not fermented in an animal organ — made as a strong tea from horsetail herb, diluted, and sprayed on plants or soil. Its primary use is reducing fungal disease pressure, particularly in wet conditions. Apply after rain or when fungal pressure is expected. It is the most accessible preparation for a beginner — horsetail can be foraged or purchased as a dried herb.
Sourcing preparations: Most national biodynamic associations offer preparations for purchase from certified makers if you cannot make your own. Starter sets are available. Making your own is preferable long-term — it connects you to the rhythms and materials of the preparations — but sourcing is a completely valid starting point.
Checkpoint — confirm before finalising:
Are you making preparations yourself or sourcing them? This changes the guidance significantly.
Do you have access to a stired water supply (a bucket and a stirring stick suffice — no machinery required for small scale)?
Is there a compost heap in operation, or is the first step establishing composting?
If you are sourcing rather than making, confirm that the supplier is a certified biodynamic preparations maker — preparation quality varies and poorly made preparations have reduced effect.
Output:
PREPARATIONS PLAN
Farm context: [farm type, scale, certification status]
IMMEDIATE PRIORITY
Preparation 500: [yes/no — application schedule]
Source: [make / purchase from ___]
Application dates: [spring / autumn — specific months]
Rate: [g per acre/ha]
COMPOST PREPARATIONS: [yes/no]
Preparations available: [502 / 503 / 504 / 505 / 506 / 507]
Source: [make / purchase]
Compost heap ready: [yes/no — if no, first step is establishing heap]
SUPPLEMENTARY
508 Horsetail: [yes/no — when to use]
YEAR 1 SEQUENCE
Month [X]: [action]
Month [X]: [action]
Month [X]: [action]
Next steps:
Run calendar (within this skill) to time your first 500 application to a favourable root day.
/s4ag-composting — build the compost heap that the 502–507 preparations will be applied to.
Run farm-organism (within this skill) to understand where preparations fit in the whole-farm system.
Calendar
How to read and use the biodynamic calendar for sowing, planting, harvesting, and processing.
The biodynamic calendar is built on the position of the Moon as it moves through the twelve zodiac constellations over approximately 27.3 days (the sidereal month). The constellations are grouped into four elemental types — earth, water, air/light, and fire/warmth — each associated with a different plant organ.
The four day types:
Day type
Constellation element
Plant organ favoured
Best for
Root
Earth (Taurus, Virgo, Capricorn)
Root
Sowing and harvesting root crops; planting bulbs
Flower
Air/Light (Gemini, Libra, Aquarius)
Flower
Sowing and harvesting flower crops; bee-keeping work; honey harvest
Fruit
Fire/Warmth (Aries, Leo, Sagittarius)
Fruit/Seed
Sowing and harvesting fruiting crops; seed saving; wine making
Leaf
Water (Cancer, Scorpio, Pisces)
Leaf
Sowing and harvesting leaf crops; lawn care; watering
Additional calendar considerations:
Ascending and descending Moon: The Moon ascends through the zodiac for roughly two weeks then descends. During descent, plants are considered more receptive to soil-side activities (composting, planting out, grafting). During ascent, harvesting and processing for best quality are favoured.
Perigee and apogee: Perigee (Moon closest to Earth) is generally unfavourable for sowing — germination and plant resistance can be weaker. Apogee (Moon furthest from Earth) is relatively neutral to favourable.
Eclipse days: Both lunar and solar eclipses are considered unfavourable — avoid sowing, harvesting, and preparation application.
Node days: When the Moon crosses the ecliptic (the nodes) — also considered unfavourable for sowing and harvesting.
How to use the calendar in practice:
You do not need to follow it rigidly to benefit from it. Start with one or two applications:
Harvest timing: Harvest root crops on root days and fruiting crops on fruit days. This has the most consistent effect on storage quality and flavour, and requires no change to your growing system — only your harvest scheduling.
Sowing key crops: Choose the day type that matches the plant organ you are growing. For tomatoes (fruit crop), sow on a fruit day. For carrots (root crop), sow on a root day. If that day is inconvenient, the next favourable day within that window is fine — do not contort your farm operations to follow the calendar; let the calendar inform your scheduling where it fits naturally.
Preparation application: Apply 500 on a root day in the afternoon. Apply 501 on a fruit or flower day in the morning.
Processing and value-adding: Wine, cheese, bread, and fermented foods made on their corresponding day types (fruit for wine, flower for cheese and honey) are reported to have better quality and keeping characteristics.
Working out what day it is without buying the calendar:
The annual Maria Thun Biodynamic Sowing and Planting Calendar (published by Floris Books) is the standard reference — available in most agricultural book suppliers. Apps exist (Biodynamic Sowing and Planting, Cosmic Rhythm) that provide daily guidance on a smartphone. If you are outside the northern European focus of the Thun calendar, regional biodynamic associations publish locally adapted versions.
What the evidence says:
The research base for the biodynamic calendar is mixed. Maria Thun's published trials showed consistent results. Independent replication has produced variable findings — some confirm the pattern, some do not. The most robust and replicated effects are in germination rates and wine and honey quality. Approach the calendar as a working hypothesis: observe your own crops over several seasons and form your own assessment. The calendar does not override good agronomy — healthy soil and good timing of inputs matters more than optimising for lunar position.
Checkpoint — confirm before finalising:
What crops are you scheduling, and what is the primary goal (sowing quality, harvest quality, or processing)?
Do you have access to the current year's calendar or an app?
Are you in the northern or southern hemisphere? (The Thun calendar publishes separate editions; southern hemisphere timing is shifted by approximately six months.)
Output:
CALENDAR SCHEDULE — [month / season]
Crop or task: [crop or activity]
Organ type: [root / flower / fruit / leaf]
FAVOURABLE WINDOWS THIS MONTH
Dates: [date range] — [day type] — [constellation]
Notes: [perigee, node, or eclipse days to avoid]
RECOMMENDED ACTIONS
[Date]: [action — sowing / planting / harvesting / spraying 500 / spraying 501]
[Date]: [action]
[Date]: [action]
AVOID
[Date]: [reason — node / eclipse / perigee]
Next steps:
Run preparations (within this skill) to schedule your 500 and 501 applications against favourable calendar days.
/s4ag-seasons — integrate the biodynamic calendar into the full year-round planning framework.
/s4ag-seeds — seed saving is most effective when harvest is timed to fruit days; connect the calendar to seed selection.
Farm Organism
Designing the farm as a self-contained organism: integration of livestock, compost, crops, and habitat.
The farm organism concept is Steiner's most ecologically ambitious idea: the farm should be capable of generating all its own fertility internally, with purchased inputs representing a nutritional deficit rather than a normal operating requirement. The biological parallel is an organism — a body that maintains itself through internal cycling, drawing on external resources only for what it genuinely cannot generate within itself.
The four elements of the farm organism:
1. Livestock
Livestock are not optional in biodynamic farming — they are the engine of fertility cycling. Cow manure is the base material for Preparation 500 and for the composting preparations. The cattle herd (or at minimum some horned cattle) provides the horns needed for the preparations and the manure of the specific quality required. Sheep, goats, pigs, and poultry each contribute differently to the farm's fertility and pest management. Without livestock (or access to manure from certified biodynamic livestock), the preparations system is constrained.
If you cannot keep cattle: biodynamic association guidelines vary on sourcing manure from non-biodynamic certified cattle. In practice, most small biodynamic growers without cattle source manure from known local farms with traditionally managed, pasture-raised, horned cattle. This is a pragmatic compromise that most practitioners accept.
2. Compost
Compost is the nutrient bridge between livestock output and crop demand. In a functioning farm organism, nothing leaves the farm that does not need to — all plant material not harvested, all manure, all kitchen and processing waste returns to the compost system. The composting preparations (502–507) regulate decomposition; the goal is a fully humified compost that introduces biology into the soil without releasing raw ammonia or triggering nutrient leaching.
Compost targets in the biodynamic system:
Temperature: 55–65°C through the thermophilic phase (hot enough to kill pathogens and weed seed, not so hot as to destroy all fungi).
C:N ratio: 25–30:1 at building; this means balancing carbon-rich material (straw, wood chip, dried plant material) with nitrogen-rich material (manure, fresh green material).
Moisture: 50–60% — the pile should feel damp but not drip when squeezed.
Turning: once at 6–8 weeks, after thermophilic phase; a second turn at 12–16 weeks.
Maturity: 4–6 months for field-ready compost; fine, earthy smell, no identifiable raw materials remaining.
3. Crops and Soil
The crop system should include:
A diverse rotation that covers the soil year-round (living roots feed the food web; bare soil is biologically costly).
At least one legume in rotation per cycle for nitrogen fixation.
A proportion of the farm in permanent cover — hedgerows, woodlands, pasture — that generates the fungal-dominated biology that the farm organism depends on.
Green manures and cover crops as the fertility bridge between livestock compost and crop demand where the livestock system alone is insufficient.
4. Habitat and Farm Individuality
The farm organism has a boundary — typically a hedgerow perimeter, woodland edge, or other permanent vegetation — that gives the farm its own biological identity and moderates the interaction with adjacent land. This is not merely ecological correctness; it is the practical mechanism by which a farm develops its own pest pressure, its own microclimatic conditions, and its own resilience.
Designing farm individuality — practical steps:
Element
Function
Minimum viable version
Perimeter hedgerow
Boundary, habitat, windbreak, frost moderation
One species hedge on at least two sides; ideally a 4–5 species mix
Permanent pasture
Fungal soil biology; grazing for manure; livestock integration
Even 10–15% of farm in permanent grass changes soil biology trajectory
Woodland or trees
Deep cycling of nutrients; mycorrhizal network hub; habitat
0 = bare soil common; 1 = cover crops used; 2 = cover crops systematic; 3 = year-round living roots
Boundary habitat
Does the farm have a defined perimeter with habitat?
0 = none; 1 = partial; 2 = most perimeter; 3 = full perimeter
Preparations use
Are all nine preparations in use?
0 = none; 1 = 500 only; 2 = 500 + compost preps; 3 = full suite
Score 0–5: Significant gaps — begin with livestock access and composting system.
Score 6–10: Developing organism — focus on the lowest-scoring criterion.
Score 11–15: Functioning organism — refine and observe rather than change.
Checkpoint — confirm before finalising:
Do you have livestock or reliable access to manure from locally known cattle?
What is the current state of the compost system — active, sporadic, or absent?
What proportion of the farm is in permanent cover (pasture, hedgerow, woodland) versus annual production?
These three answers determine whether the farm organism is a near-term or medium-term development goal and which element to address first.
Output:
FARM ORGANISM ASSESSMENT
Farm size: [ha/acres]
Enterprise type: [crops / livestock / mixed]
ORGANISM SCORE
Livestock integration: [0–3] — [note]
Compost system: [0–3] — [note]
Cover and rotation: [0–3] — [note]
Boundary habitat: [0–3] — [note]
Preparations use: [0–3] — [note]
TOTAL: [0–15]
PRIORITY DEVELOPMENT AREAS
1. [lowest scoring criterion — specific action]
2. [second priority]
3. [third priority]
5-YEAR FARM ORGANISM DEVELOPMENT PLAN
Year 1: [action — most impactful, lowest cost or disruption]
Year 2: [action]
Year 3: [action]
Year 4: [action]
Year 5: [action]
INDICATORS TO MONITOR
- [biological or production indicator]
- [indicator]
Next steps:
/s4ag-composting — develop the compost system that is the nutrient bridge of the farm organism.
/s4ag-livestock — integrate grazing animals into the farm cycle to build the manure supply the preparations require.
/s4ag-biodiversity — develop the boundary habitat and permanent cover that gives the farm its biological individuality.
Transition
Moving from organic or conventional to biodynamic: sequencing preparations and practices.
Most farmers who adopt biodynamics arrive from one of three positions: fully conventional (using synthetics), organic (no synthetics, but preparations not yet in use), or partially biodynamic (some preparations used, but not the full system). The transition pathway differs for each.
Where are you starting from?
Starting position
Primary barriers
First steps
Fully conventional
Synthetic inputs, no composting system, possibly no livestock
1. Establish composting; 2. Remove one synthetic input category at a time; 3. Begin 500 applications alongside existing inputs
Organic
Composting likely in place; no preparations
1. Source or make composting preparations; 2. Begin 500 applications; 3. Add 501 in second season
Partially biodynamic
Variable gaps in preparations or calendar use
1. Audit which preparations are missing; 2. Develop farm organism elements that are absent
Conventional to Biodynamic — detailed pathway:
Year 1:
Establish or improve compost system. Apply composting preparations (502–507) at first opportunity.
Source Preparation 500. Apply in spring and autumn — do not wait until the system is "ready."
Begin calendar observation — note sowing and harvest dates and the corresponding calendar day. Do not change practice yet; just record.
Reduce synthetic nitrogen by 20% and replace with compost or organic matter.
Begin reducing fungicide use — this is the most biologically damaging input and the one most in conflict with biodynamic practice.
Year 2:
Apply 500 three to four times per year (spring, twice in growing season, autumn).
Introduce 501 on fruiting and flowering crops.
Begin timing key sowings and harvests to calendar.
Reduce synthetic inputs by a further 20–30%. Introduce a leguminous cover crop to compensate nitrogen.
Establish a hedgerow or extend permanent cover if not present.
Year 3:
Full preparations suite in use.
Calendar integration into main crop and harvest scheduling.
Begin formal transition to Demeter certification if desired (the Demeter conversion period is typically two years, aligned with organic conversion in most jurisdictions).
Livestock integration or manure supply formalised.
Year 4–5:
Farm organism assessment and gap-filling.
Certification inspection and registration if pursuing Demeter.
Develop on-farm preparations making if not already in place.
Managing the yield transition:
The transition dip is real. Crops adapted to soluble nitrogen show yield decline in years 1–3 as the biology recovers and begins supplying mineralised nutrients. This is normal and not evidence that the system is failing. The conventional approach is to hold synthetic inputs constant while adding biological inputs — a slower transition but lower financial risk. The more ambitious approach (replacing synthetics quickly) produces faster biological recovery but a sharper yield dip.
Match your pace to your financial resilience:
If margins are tight: hold synthetics constant; add biology alongside for 2–3 seasons; reduce synthetics only when biological indicators improve (earthworm counts, OM trend, crop response).
If margins allow: reduce synthetics aggressively in Year 1; accept the dip; recover in Year 3–4.
Demeter Certification — overview:
Demeter is the primary biodynamic certification body. Requirements beyond organic:
All nine preparations in use.
Minimum 10% of farm in biodiversity habitat.
Biodynamic calendar in use for sowing and harvesting.
Livestock on farm or formal access arrangement for manure supply.
Conversion period: typically 2 years (may align with organic conversion period).
Annual inspection and documentation.
Contact the national Demeter body for current standards and fees — these vary by jurisdiction. In the UK: Demeter UK. In the US: Demeter USA. In Australia: Bio-Dynamic Research Institute (BDRI). In New Zealand: Biodynamic Association of New Zealand.
Checkpoint — confirm before finalising:
Are you starting from conventional, organic, or partially biodynamic practice? This determines the sequence entirely.
Is Demeter certification a goal, or is the aim to farm biodynamically without formal certification?
What is the current compost system status — and is there access to manure from cattle or other livestock?
Output:
BIODYNAMIC TRANSITION PLAN
Starting position: [conventional / organic / partial]
Certification goal: [Demeter / no certification / undecided]
Livestock access: [own cattle / external source / none]
YEAR 1 ACTIONS
[Quarter 1]: [action]
[Quarter 2]: [action]
[Quarter 3]: [action]
[Quarter 4]: [action]
YEAR 2 ACTIONS
[action]
[action]
YEAR 3 TARGET STATE
[description of where the farm should be]
SYNTHETIC INPUT REDUCTION SCHEDULE
Current inputs: [list key inputs]
Year 1 reduction: [which inputs, by how much]
Year 2 reduction: [which inputs, by how much]
Year 3 target: [remaining inputs if any]
CERTIFICATION PATHWAY
If pursuing Demeter:
Start conversion: [year]
Target inspection: [year]
National body contact: [body name]
INDICATORS TO WATCH
- [earthworm count / OM trend / crop response indicator]
- [indicator]
Next steps:
Run preparations (within this skill) to plan which preparations to source or make first.
/s4ag-regenerative — biodynamic transition sits within a broader regenerative direction; align both frameworks.
/s4ag-certification — if Demeter certification is a goal, get the full certification process detail.
