This chapter covers the EU organic regulation as it applies to algae — both marine seaweed and land-based microalgae — and other voluntary certification schemes relevant to the sector: kosher, halal, vegan, fair-trade and similar. It is closely linked to Agriculture and Land-based Cultivation (which covers land-based production classification) and Cosmetics — Certification Schemes (which covers COSMOS and NATRUE for personal care products).

Regulation (EU) 2018/848 of the European Parliament and of the Council of 30 May 2018 on organic production and labelling of organic products and repealing Council Regulation (EC) No 834/2007, OJ L 150, 14.6.2018, p. 1. EUR-Lex

Regulation (EU) 2018/848 is the governing framework for EU organic production and the use of the EU organic logo. It replaced the earlier Regulation (EC) No 834/2007 and its main implementing regulation (EC) No 889/2008. The 2018 Regulation came into full force on 1 January 2022 after a transition period. It explicitly includes seaweeds and microalgae within its scope, treating them as aquaculture products (Part III) while simultaneously acknowledging that they are plant-derived commodities for CN/nomenclature purposes — reflecting the genuine regulatory hybridity of algae discussed throughout these pages.

Under Regulation (EU) 2018/848, organic rules apply to:

• Marine macroalgae (seaweeds) — wild-harvested from EU coastal waters or cultivated in sea water, brackish water, or coastal sea installations. Covered under the aquaculture chapter (Part III, Annex II Part IV).
• Microalgae — cultivated in land-based closed or open production systems. Also covered under the aquaculture chapter, with specific provisions acknowledging the fundamentally different nature of microalgae production compared to sea-based macroalgae cultivation.

The Regulation does not apply to marine macroalgae wild-harvested from waters outside EU jurisdiction, or to algae processed and sold in the EU where the primary production occurred in a third country under a different regulatory framework — in the latter case, equivalence recognition or import certification applies.

Wild harvest of seaweed from sea or coastal waters can be certified organic under the Regulation provided:

• The harvest area is not subject to pollution from adjacent land or sea activities that would compromise the organic status of the seaweed.
• Harvesting does not disrupt the stability of the natural marine environment or the maintenance of the seaweed species in the harvest area.
• The harvest area must be subject to a management plan, agreed with the relevant competent authority, ensuring sustainable harvest levels.
• An environmental assessment is not required for wild harvest (unlike for new organic aquaculture installations above 20 tonnes per year).

The key practical challenge for organic wild harvest certification is demonstrating that the harvest area meets the pollution criteria — this requires water quality monitoring data and assessment relative to the standards set in EU water quality legislation (Water Framework Directive, Marine Strategy Framework Directive). Areas near industrial, agricultural or urban discharge points, or within marine protected areas subject to sensitive designations, may not qualify.

Seaweed cultivation certified as organic must comply with the production rules in Annex II, Part IV of Regulation (EU) 2018/848. Key provisions:

• Cultivation must take place in sea water or brackish water; for land-based seaweed cultivation systems, the water quality requirements for the input water apply.
• No fertilisation is permitted in open water systems (cultivation ropes, longlines at sea). Seaweeds grown in open water systems must rely entirely on the naturally available nutrients in the surrounding water.
• For seaweed cultivated in land-based systems with controlled water input, certain nutrient additions may be permitted under conditions. National competent authorities implementing the Regulation may have issued guidance on permitted nutrient inputs for land-based seaweed cultivation.
• No chemical pest control or growth regulators are permitted.
• An environmental assessment is required for new aquaculture installations producing more than 20 tonnes of organic product per year.
• Organic seaweed cultivation is subject to the general record-keeping, control body certification, and annual inspection requirements of the Regulation.

Microalgae production in land-based closed systems (photobioreactors, tanks, raceway ponds covered by a greenhouse or otherwise enclosed) is subject to the aquaculture chapter provisions but with specific adaptations reflecting the realities of microalgae production:

• The principle that “only low-solubility mineral fertilisers may be used” — a cornerstone of organic crop farming — does not apply to microalgae, because microalgae require soluble nutrient forms for growth. The EGTOP advisory group confirmed this distinction in its Final Report on Fertilisers IV (2019), and Regulation (EU) 2018/848 and its implementing and delegated acts explicitly permit the use of soluble mineral nutrient forms for microalgae grown in closed land-based systems, subject to conditions.
• Permitted nutrient sources for organic microalgae are defined in Annex I to the Regulation (and in implementing measures) and include certain mineral salts and other materials. The permitted list does not extend to all possible inputs; producers must verify that their specific nutrient regime is covered.
• Heterotrophic microalgae production (in sealed fermenters using organic carbon sources such as sugar) is a special case. The Regulation's aquaculture chapter does not readily accommodate heterotrophic production, which resembles industrial fermentation more than aquaculture. In practice, certification of heterotrophic microalgae production as organic has been difficult to achieve, and the regulatory status of this production method under the Regulation remains unclear. Producers of heterotrophically produced microalgae should seek advice from their control body before investing in an organic certification pathway.
• Open raceway ponds are treated more restrictively than closed systems for nutrition purposes — inputs must be compatible with the more conservative rules applicable to open water systems.

A conversion period applies before organic certification can be granted:

• For seaweed wild harvest areas: the certification body assesses the pollution and sustainability criteria — there is effectively no time-based conversion period, but the area must pass the initial assessment.
• For seaweed cultivation installations: a conversion period applies, typically 12 months from the date the first organic inspection confirms compliance.
• For land-based microalgae production: similar conversion period requirements; details depend on national implementing rules and the certification body.

Products certified as organic under Regulation (EU) 2018/848 are entitled to use the EU organic logo (the green leaf logo) and must bear the code number of their control body. The use of the term “organic” on the label is reserved for products that have undergone certification and comply with the Regulation. Where the product is sold as a pre-packed food, the code number and the origin indication (“EU Agriculture”, “non-EU Agriculture”, or a specific country) must be stated.

Council Regulation (EC) No 834/2007 and its implementing regulations (EC) No 889/2008 (including the dedicated seaweed and aquaculture provisions of Commission Regulation (EC) No 710/2009) have been fully repealed and replaced after the transition period that ended on 1. January 2022.

Kosher certification is relevant for algae in food applications. The major kosher certification organisations (OU, OK, Star-K and others) have developed positions on algae: microalgae grown in controlled environments without crustacean or insect contamination are generally considered kosher and may be certified. The presence of small crustaceans or other non-kosher organisms as contaminants in harvested seaweed is a recurring issue in kosher status assessments for wild-harvested species. Kosher certification is issued by private religious certification organisations, not by EU authorities, and is governed by religious law rather than EU regulation.

Algae are generally accepted as halal (permissible), being plant-derived aquatic organisms. The EU does not maintain a harmonised halal certification system; halal certification is issued by accredited private certification organisations and is voluntary. Some buyers in the Middle East and Southeast Asian markets require formal halal certification documentation.

For microalgae products produced without any animal-derived inputs or tested on animals, vegan certification may be sought through organisations such as The Vegan Society (UK) or V-Label (EU). The absence of animal-derived inputs is a key criterion, which aligns well with many microalgae production systems. Check specific certification body criteria, as some vegan schemes also address fishing and aquaculture sourcing in ways that may affect the certification pathway for seaweed-derived products.

Fair trade schemes (Fairtrade International, Fair for Life, etc.) are relevant for algae sourced from small-scale producers in developing countries. These are private certification schemes focused on supply chain social standards. Market demand for fair-trade algae products exists in some premium market segments, particularly for dried seaweed from Asian or West African supply chains.

• Wild harvest certification requires documented water quality data for the harvest area and a sustainable harvesting management plan — engage with your national competent authority and control body early in the planning process.
• Land-based microalgae producers should clarify with their chosen control body whether their specific nutrient inputs and production system configuration are certifiable before committing to a certification pathway.
• Heterotrophic producers should not assume organic certification is available for their production method without specific advice.
• Multiple certifications (organic + kosher, organic + vegan) are common in the premium microalgae supplement market and represent a significant marketing asset.
• The conversion period has business planning implications; certification cannot be claimed during the conversion period, and “in conversion” status has limited market value. Factor the conversion timeline into product launch planning.

See also: Agriculture and Land-based Cultivation | Aquaculture and Wild Harvesting | Fertiliser Product Regulation | Cosmetics — Certification Schemes | EU Quality Schemes and Geographical Indications

Last reviewed: June 2026.