Fertilization of hazelnut in organic production¶
Content generated by artificial intelligence — verify before application
This article was automatically compiled from a collection of hazelnut literature using artificial intelligence and may contain errors or outdated data. It serves as a starting point for further research, not as professional advice. Dosages, products, and timing are informative and depend on the cultivar, location, and applicable regulations — always verify with an advisory service and official sources before application.
Fertilization of hazelnut in organic production differs significantly from conventional practices: it is not enough to determine the correct nutrient dose, but you must use only fertilizers, soil improvers, and nutrients that are explicitly approved by European Union regulations on organic production. For hazelnut growers, this means a dual obligation: on the one hand, to fertilize rationally and in accordance with the orchard's needs and soil analysis, and on the other hand, to prove that every input applied is permitted and properly documented. Choosing the wrong fertilizer — for example, a commercial product that is "organic" but not approved for organic production — can result in the loss of certification, and thus the right to subsidies. Below is an overview of what is permitted, how to verify and document it, what restrictions apply, and how it fits into intervention 31.08 (eco-scheme for the application of organic fertilizers in permanent crops).
Legal framework: what the regulation requires¶
The basis is Regulation (EU) 2018/848 of the European Parliament and of the Council on organic production and labelling of organic products (which replaced the old Council Regulation (EC) No 834/2007). Its Article 24(1)(b) stipulates that only products and substances approved by the Commission and listed in the register may be used as fertilizers, soil improvers, and nutrients in organic production.
This list is contained in Annex II of Commission Implementing Regulation (EU) 2021/1165 of 15 July 2021 on the approval of certain products and substances for use in organic production and the establishment of their lists. The principle is simple but strict:
For the purposes of Article 24(1)(b) of Regulation (EU) 2018/848, in organic production, only the products and substances listed in Annex II may be used as fertilizers, soil improvers, and nutrients.
Additionally, permitted fertilizers may only be used in accordance with the specifications and restrictions on use established in Union and national legislation. Stricter conditions for use in organic production are listed in the right-hand column of the tables in Annex II. In other words, even if a substance is on the list, the method and context of application may be further restricted (e.g., a requirement for "need recognized by the control body").
In addition to EU regulations, general Croatian regulations on fertilization and water and soil protection apply independently of organic status:
- The Act on Fertilizers and Soil Improvers,
- The Rulebook on the Protection of Agricultural Land from Pollution,
- The Rulebook related to the Action Programme for the Protection of Waters from Pollution by Nitrates of Agricultural Origin (Nitrate Directive).
Permitted fertilizers and soil improvers¶
Annex II covers a wide range of organic and mineral substances of natural origin. For hazelnut orchards, the most relevant in practice are organic sources of nitrogen and soil organic matter improvers, as hazelnut responds particularly well to soil humus supply (it stimulates microbial activity and ectotrophic mycorrhizal activity on roots).
The following table provides an overview of typical, permitted inputs cited in literature for organic hazelnut cultivation. The list is informative and simplified — the original text of Annex II of Regulation 2021/1165 with its associated conditions of use is always authoritative.
| Group | Examples of permitted inputs | Note / Condition |
|---|---|---|
| Farmyard manure and slurry | Solid farmyard manure, mature (composted) manure, slurry, liquid manure | Preferably from organic farming; prohibited origin from industrial ("factory") livestock farming |
| Poultry | Mature chicken manure from organic farming | High nitrogen content — dose carefully |
| Compost | Compost from organic waste from organic farms, compost from wood bark | No prohibited admixtures; subject to conditions in Annex II. |
| Vermicompost | Lumbricompost (earthworm castings) | Soil structure and microbiology improver |
| Plant sources | Green manure (cover crops), straw from organic farming, mulch | Particularly useful in the first years of the orchard |
| Seaweed | Seaweed and seaweed products, potassium from seaweed | Often used as a biostimulator (foliar) |
| Mineral — phosphorus | Soft (raw) rock phosphate | Cadmium content restrictions |
| Mineral — potassium | Raw potassium salts, potassium sulfate | According to need recognized by analysis |
| Mineral — calcium/magnesium | Limestone, calcium sulfate (gypsum), magnesium sulfate | For pH correction and Ca/Mg supply |
| Other | Stone flour, Thomas slag (basic slag), biodynamic and homeopathic preparations, microorganism preparations | Subject to conditions in Annex II. |
Note for hazelnut: In autumn foliar feeding of hazelnut, micronutrients are particularly important, with an emphasis on boron (B) and zinc (Zn), as shoots and female buds form in early autumn, immediately before harvest. In organic production, foliar products (e.g., boron-based fertilizers or biostimulators based on cold-pressed seaweed) must have a valid certificate for application in organic agriculture. In the corpus, such products are listed with a valid EcoCert certificate in accordance with EU standards, which is a typical example of proof of acceptability.
What is NOT automatically permitted¶
The key trap: the label "organic fertilizer" on the packaging does not mean that the product is acceptable in organic production. Many organic and organo-mineral fertilizers on the market contain ingredients or origins that are not in compliance with Annex II. Therefore, the grower must actively verify every product and not rely on marketing labels.
How to verify and document inputs¶
Verification of fertilizer permission is the responsibility of the grower, not the state. The Ministry of Agriculture has no legal obligation to maintain a list of trade names of fertilizers permitted in organic production. A practical verification procedure before purchase and application:
- Request a fertilizer analysis/declaration from the supplier and compare the composition with permitted substances from Article 24(1)(b) of Regulation (EU) 2018/848, or Annex II of Regulation 2021/1165.
- Check the product certificate — e.g., a statement/certificate from an accredited body (such as an EcoCert label) that the product is acceptable in organic production.
- Request an opinion/approval from your control body (the authorized control organization that certifies you). If Annex II requires a "need recognized by the control body" for a certain substance, this is a mandatory step.
- Check the FIS database (Phytosanitary Information System of the Ministry of Agriculture) — it contains a list of registered plant protection products permitted in organic production. FIS primarily relates to plant protection (Annex I of Regulation 2021/1165), but it is a useful part of the same documentation discipline in organic farming.
- Keep a record of fertilization (type and amount of fertilizer, date, method of application — broadcast, in strips, or fertigation — and ARKOD parcel). The record is mandatory and subject to control by the control body.
Checklist before applying fertilizer¶
| Step | Question | Proof kept |
|---|---|---|
| 1 | Is the substance on the list from Annex II (2021/1165)? | Excerpt from regulations / advisor's opinion |
| 2 | Does it meet the conditions in the right-hand column (e.g., origin, cadmium limits)? | Product declaration/analysis |
| 3 | Does the product have a certificate for organic production? | Certificate (e.g., EcoCert) |
| 4 | Is the application approved/recognized by the control body (if required)? | Written confirmation from the control body |
| 5 | Do I have a soil analysis and fertilization plan? | Laboratory result + plan |
| 6 | Is the input recorded in the fertilization register? | Register form |
Application restrictions¶
Even when using permitted fertilizers, quantitative and seasonal restrictions apply arising from water and soil protection.
Nitrogen limit of 170 kg N/ha¶
The maximum permitted amount of nitrogen application from farmyard manure on agricultural land is 170 kg N/ha per year — this is the limit arising from the Nitrate Directive and applies to nitrogen of animal origin. For hazelnut itself, the corpus also cites a lower, agronomically recommended upper limit for the total annual dose of pure nitrogen of approximately 120 kg N/ha (in the context of fruit quality specifications), which is often a more realistic target value in practice.
| Parameter | Value | Source / Context |
|---|---|---|
| Maximum N from farmyard manure | 170 kg N/ha/year | Nitrate Directive / water protection |
| Recommended upper N limit for hazelnut | ~120 kg N/ha/year | Fruit quality specification (informative) |
| Meliorative input of composted manure before planting | 30,000–40,000 kg/ha | Literature on orchard establishment (depends on soil analysis) |
| Annual input of composted manure in a bearing orchard | ~5,000 kg/ha | Hazelnut cultivation literature (informative) |
All dosages are informative and depend on the cultivar, soil fertility, and pH, humus content, and applicable regulations. The authoritative sources are the soil analysis and the recommendation of an authorized laboratory.
Seasonal ban on manure (1 May – 1 September)¶
Fertilization with solid farmyard manure is prohibited on all agricultural land from 1 May to 1 September. Additionally, it is prohibited to fertilize with organic manure:
- on waterlogged soil,
- mixed with waste sludge,
- from farms where diseases with pathogens resistant to conditions in the manure pit have been identified.
Organic fertilizers should be applied under favorable weather conditions (cool, cloudy weather) and in quantities that the plant actually needs. For hazelnut, this practically means planning the bulk of organic fertilization in autumn or early spring, outside the prohibited period.
Hazelnut fertilization calendar (indicative)¶
| Period | Activity | Note |
|---|---|---|
| Before orchard establishment | Meliorative fertilization with composted manure according to soil analysis | Fertilizers with little or no nitrogen for reserve |
| Autumn (September–November) | Input of mature manure/compost, foliar boron and zinc | After 1 September; before leaf fall for shoots and buds |
| Early spring | Supplement of organic nitrogen, biostimulators (seaweed) | Before vegetation break |
| 1 May – 1 September | PROHIBITION of solid farmyard manure | As needed green manure / mulching |
| ## Intervention 31.08 — Support for organic fertilizers in permanent orchards |
Within the framework of the Strategic Plan of the Common Agricultural Policy (CAP) of the Republic of Croatia, eco-scheme 31.08 "Application of organic fertilizers in permanent orchards" directly incentivizes the use of approved organic fertilizers. Key features:
| Item | Value / Condition |
|---|---|
| Support amount | approx. 250 EUR/ha (annual obligation) |
| Minimum area | 1 ha |
| Eligible areas | permanent orchards in ARKOD (fruit orchards — including hazelnut, olive groves, vineyards, multi-year mixed orchards) |
| Mandatory fertilizers | exclusively those approved according to Art. 24 para. 1 point (b) of Regulation (EU) 2018/848, Annex II of Regulation 2021/1165 |
| Soil analysis | mandatory for all ARKOD parcels where eco-fertilizer is applied |
| Record keeping | mandatory maintenance of records on fertilizer application by parcel |
The support amount and exact conditions are defined by the annual Regulation on the implementation of direct agricultural support and LEADER measures of rural development, and may change from year to year — check the current regulation and advisory material for the current year.
It is important to distinguish this eco-scheme from the broader intervention 70.04 "Organic Farming", which supports the full transition to and maintenance of organic production (in the corpus, amounts for permanent orchards are cited at approximately ~516 EUR/ha for the transition period and maintenance, and ~60 EUR/ha support for certification). Both interventions require the use of plant protection products and fertilizers approved by Regulation 2021/1165 and the maintenance of records.
Practical recommendations and common mistakes¶
Recommendations:
- Start with soil and leaf analysis. Base the fertilization plan for the organic orchard on the findings of an authorized laboratory; conduct foliar leaf analysis after harvest.
- Plan organic nitrogen in advance. Due to the ban on manure during the summer period, schedule organic fertilization for autumn and early spring.
- Build soil organic matter. Green manuring in the inter-row space, vermicompost, and mulching long-term improve nutrient supply and hazelnut mycorrhiza.
- Keep the paperwork. Fertilizer certificates, labels, analysis results, and fertilization records — all of this is required by the control body and the Payment Agency.
Common mistakes:
- Assuming that "organic" = "allowed in organic production" — always check Annex II and the certificate.
- Application of solid manure within the prohibited period (May–September).
- Exceeding the limit of 170 kg N/ha from farmyard manure.
- Using fertilizers without prior approval from the control body when the regulation requires it.
- Lack of soil analysis for parcels included in intervention 31.08 — which leads to loss of support rights.
- Manure or slurry originating from intensive ("factory") livestock farming.
Sources¶
This article is an AI summary generated from an internal collection of hazelnut literature (RAG corpus) and public official sources. Main sources used:
- Regulation (EU) 2018/848 of the European Parliament and of the Council on organic production and labelling of organic products (Art. 24).
- Commission Implementing Regulation (EU) 2021/1165 of 15 July 2021 (Annex I — plant protection products; Annex II — fertilizers, soil improvers and nutrients) — EUR-Lex.
- Advisory material — Intervention 70.04 Organic Farming (Ministry of Agriculture / Advisory Service), RAG corpus.
- Advisory material — Intervention 31.08 Application of organic fertilizers in permanent orchards (2024), RAG corpus and savjetodavna.mps.hr.
- Eco-scheme 31.08 — Directorate for Agricultural Support and Rural Development — ruralnirazvoj.hr and Ruralno EU.
- Regulation on the implementation of direct agricultural support and LEADER measures of rural development — Narodne novine 157/2023.
- Selection of fertilizers and fertilization in organic production — Gospodarski list — gospodarski.hr.
- Technology and economics of organic hazelnut production; Environmental impact assessments for hazelnut orchards (Sisak-Moslavina and Osijek-Baranja County); Technological guide for foliar fertilization of hazelnut (2021.); Autumn fertilization of woody crops; Update of calculations for Measure 11 — Organic Farming — all from the RAG corpus of the hazelnut literature collection.
Note: support amounts, doses, and deadlines change over time and depend on current regulations — before implementation, check the current annual regulation, the original text of EU regulations, and consult the competent advisory service and your control body.
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