Biological, organic and ecological fertilizers are certified plant-nutrition inputs derived from natural sources — plant extracts, mineral compounds, microbial biomass — authorised under EU Regulation CE 2018/848, NOP USDA and JAS for use in certified organic farming. They are sustainable alternatives to synthetic fertilizers because they improve soil biology, contain no chlorides and leave no harmful residues. In Europe and Latin America they are legally equivalent and often called interchangeably.
Introduction
The global agriculture sector faces a dual challenge: feeding a growing population while reducing its environmental footprint. Biological, organic and ecological fertilizers have emerged as one of the most credible answers to this challenge. Unlike conventional synthetic fertilizers — produced via the Haber-Bosch process, energy-intensive and prone to nutrient leaching — organic alternatives supply plant nutrition through natural pathways that work with soil biology rather than bypassing it.
In Europe, the shift is regulatory as well as agronomic. EU Regulation CE 2018/848, in force since January 2022, defines strict criteria for inputs authorised in organic farming, creating a unified legal framework across 27 member states. In Latin America, similar frameworks exist at national level — SENASA in Argentina, SAG in Chile, SENASICA in Mexico — and export-oriented producers increasingly demand certification compatible with European and North American organic standards.
This article explains what biological, organic and ecological fertilizers are, how they differ (and where they overlap), what role they play in sustainable agriculture across Europe and Latin America, and how to select and apply them for maximum agronomic and commercial impact.
Biological vs Organic vs Ecological Fertilizers: Are They the Same?
The three terms are often used interchangeably in trade and agronomic practice, but they have distinct technical meanings:
Organic fertilizers are products that contain carbon-based compounds derived from plant, animal or microbial sources. The key characteristic is the origin of the nutrients — they come from biological matter, not from chemical synthesis. Nitrogen in an organic fertilizer, for example, may come from soy protein hydrolysate, blood meal or freshwater microalgae.
Ecological fertilizers (fertilizantes ecológicos) is the formal EU terminology for fertilizers approved for use in organic farming under CE 2018/848. In practice, an ecological fertilizer is an organic fertilizer that has passed the certification requirements of the regulation. In Spain, the term "ecológico" is the official one; in common use, "orgánico" and "ecológico" are synonymous.
Biological fertilizers typically refer either to microbial inoculants (products containing living bacteria or fungi such as Rhizobium, Azospirillum or mycorrhizae that fix nitrogen or solubilise phosphorus) or, more broadly, to any fertilizer derived from a biological source — overlapping with "organic fertilizer." Some regulatory frameworks distinguish between "biostimulants" and "biological fertilizers" based on whether the main function is nutrient supply or growth promotion. EU Regulation 2019/1009 on fertilising products clarifies these distinctions within European law.
For practical purposes: if a fertilizer is certified CE 2018/848 and NOP USDA, it qualifies as organic, ecological and biological — all three terms apply. Ecoganic's full range of ecological fertilizers meets all three certifications.
Sustainable Alternatives in European Agriculture
Europe currently accounts for approximately 35% of global certified organic farmland, with nearly 17 million hectares under organic management (Eurostat, 2023). The European Green Deal and the Farm to Fork strategy target 25% of all EU agricultural land under organic farming by 2030 — from around 10% today. This ambitious target implies a massive increase in demand for inputs approved under CE 2018/848.
The main sustainability arguments for organic and ecological fertilizers in European agriculture are:
- Reduced nitrate leaching. Organic nitrogen (from amino acid hydrolysates, plant meals or algae extracts) is released more gradually than ammonium nitrate, reducing the risk of nitrate contamination of groundwater — a key concern under the EU Nitrates Directive.
- No chloride accumulation. Synthetic muriate of potash (KCl) introduces chloride into the soil profile, which can reduce fruit quality in chloride-sensitive crops (avocado, strawberry, citrus) and negatively impact soil structure. Certified organic potassium sources are chloride-free.
- Soil biology enhancement. Organic inputs provide carbon substrates and micronutrients that stimulate soil microbial activity, improve aggregate stability and support long-term soil fertility — consistent with European soil health objectives under the EU Soil Strategy 2030.
- Market premium access. Products grown with CE 2018/848-certified inputs can carry the EU organic logo, commanding a price premium of 20–80% over conventional equivalents in retail.
For high-value horticultural and permanent crops — olive, citrus, tomato, grapevine — switching to an organic fertilisation programme based on certified inputs is both agronomically and economically viable. Independent field trials by Ecoganic demonstrate equivalent or superior yields versus conventional synthetic programmes in olives, citrus and tomato under drip fertigation.
Organic Fertilizers in Latin American Agriculture
Latin America is one of the world's largest producers of certified organic products — Argentina alone had over 3.7 million hectares of certified organic land in 2023, the largest in the southern hemisphere. Brazil, Uruguay, Chile, Peru and Mexico are all significant producers for export to Europe, Japan and North America, markets that require certified organic inputs along the entire production chain.
The regulatory landscape varies by country:
- Argentina: SENASA Resolution 374/2020 governs organic production inputs. Products must be listed in SENASA's registry. Many European-certified products (CE 2018/848) are accepted as equivalent or can be registered.
- Chile: SAG Resolution 5985/2013 and the Chilean Organic Standard NCh 2439 regulate organic production. Equivalence with EU certification is recognised for export purposes.
- Mexico: The Law of Organic Production Products (2006) and SENASICA regulations govern organic inputs. USDA NOP certification is widely recognised.
- Brazil: Instrução Normativa No. 46/2011 (MAPA) regulates organic production and authorised inputs.
In this context, fertilizers certified under CE 2018/848 and NOP USDA have a significant commercial advantage: they are pre-cleared for most export markets and can be marketed to Latin American organic producers targeting European or North American buyers. Ecoganic's distributor network in Latin America currently covers Argentina, Chile and Mexico, with products registered or in the registration process in each market.
Key crops where organic fertilizers are gaining adoption in Latin America include: blueberry (Chile, Peru — extremely sensitive to chlorides, NOP-certified export), avocado (Mexico, Chile — chloride-sensitive, premium organic market), soy and corn (Argentina — large-scale organic production for export), citrus (Argentina, Uruguay) and greenhouse tomato and pepper (Mexico).
Ecoganic Technology: Freshwater Unicellular Algae Formulations
Ecoganic's approach to organic fertilization is differentiated by the use of freshwater unicellular microalgae — specifically Chlorella and Scenedesmus — as the biological base of its biostimulant products, combined with a range of mineral-origin certified fertilizers.
Why freshwater algae, not marine algae? Most algae-based biostimulants on the market use brown marine algae such as Ascophyllum nodosum or Ecklonia maxima. Marine algae products may introduce residual sea salts and are variable in composition depending on harvesting conditions and season. Freshwater unicellular algae are cultivated under controlled conditions, are entirely chloride-free, have a consistent and verifiable composition batch-to-batch, and contain a higher ratio of active compounds (phytohormones, amino acids, polysaccharides) per unit of dry mass.
The core Ecoganic fertilizer range certified CE 2018/848, NOP USDA and JAS includes:
- NITROTECH 16 — 16% organic nitrogen (N-total), 100% water-soluble liquid suspension, suitable for all crops by drip fertigation or foliar spray.
- PHOSMAX 20 — 20% phosphorus pentoxide (P₂O₅), compatible with pH 4–8, 100% water-soluble.
- CALCIUM 40 — 40% calcium oxide (CaO), chloride-free, critical for fruit quality and cell wall rigidity.
- BOOST UNIVERSAL — freshwater unicellular algae biostimulant (0-0-1), containing natural phytohormones (auxins, cytokinins, gibberellins), amino acids and polysaccharides.
- FULVEX 50S — 50% fulvic acids, improving cation exchange capacity and micronutrient availability in the root zone.
All products are formulated for complete dissolution in cold water, are compatible with standard drip fertigation systems (no filter or dripper clogging) and can be mixed with most certified organic crop protection products.
How to Choose and Apply Organic Fertilizers
Selecting the right organic fertilizer requires matching the product's nutrient composition and release pattern to the crop's phenological stage and soil analysis. Key principles:
1. Base decisions on soil and water analysis. Organic fertilizers interact with soil biology in ways that synthetic inputs do not. A soil analysis (N-P-K, pH, organic matter, EC) and, in irrigated systems, a water analysis (bicarbonates, sodium, chloride) are the starting point for any organic programme design.
2. Match nitrogen form to crop stage. Organic nitrogen (from amino acid hydrolysates or plant meals) is mineralised by soil microorganisms and becomes available gradually. In intensive vegetable crops or under cool soil temperatures, fast-available organic nitrogen sources (amino acid-complexed N) are preferred over slow-release forms. NITROTECH 16 is an example of a fast-available organic nitrogen suitable for all crops and conditions.
3. Combine fertilizers with biostimulants. Research consistently shows synergy between organic fertilizers and biostimulants (particularly algae-based). Biostimulants improve root architecture and nutrient uptake efficiency, reducing the total organic fertilizer dose needed to achieve the same yield outcome. A standard Ecoganic programme applies BOOST UNIVERSAL at transplanting, flowering and fruit set, with the organic fertilizer programme running throughout the cycle.
4. Adjust for chloride sensitivity. For avocado, blueberry, strawberry, asparagus and most greenhouse crops, chloride in irrigation water or fertilizers can cause leaf burn, reduced fruit quality and yield loss. Exclusively chloride-free organic fertilizers (all Ecoganic products are chloride-free) are strongly recommended for these crops.
5. Verify certification for your target market before buying. Not all "organic" fertilizers carry CE 2018/848 certification. Producers selling to the EU, Japan or the USA must use inputs from the approved substances list of the respective regulation. Request the official certification document (ECOCERT, IMO, CAAE or equivalent) from your supplier. View Ecoganic's certifications here.
Frequently Asked Questions
What are biological fertilizers and how do they differ from chemical fertilizers?
Biological fertilizers are nutrient inputs derived from biological sources — plant extracts, animal by-products, microbial biomass or mineral compounds of natural origin. They differ from chemical (synthetic) fertilizers in their origin (natural vs. factory-synthesised), their mode of action (they interact with soil biology rather than bypassing it), and their legal status (biological/organic fertilizers can be used in certified organic farming; synthetic ones generally cannot). Biological fertilizers typically release nutrients more gradually, improving soil health long-term, while providing comparable plant nutrition to synthetic alternatives when formulated and applied correctly.
Are organic and ecological fertilizers the same thing?
In practice, yes. In Spain and the European Union, "fertilizantes ecológicos" (ecological fertilizers) and "fertilizantes orgánicos" (organic fertilizers) refer to the same category of plant nutrition products authorised for use in organic farming under EU Regulation CE 2018/848. The formal EU terminology uses "ecological" (ecológico), but "organic" (orgánico) is the widespread common usage. A fertilizer is both "organic" and "ecological" if it meets CE 2018/848 criteria. All Ecoganic fertilizers are certified under CE 2018/848 (EU), NOP USDA (USA) and JAS (Japan) — meeting the organic/ecological definition across all three major markets.
Which organic fertilizers are certified for European organic farming under CE 2018/848?
EU Regulation CE 2018/848 (Annex II, Part I) lists the authorised substances for use as fertilizers and soil conditioners in organic production. Authorised categories include plant-based fertilizers (composts, green manures, plant hydrolysates), animal-based fertilizers (blood meal, bone meal, feather meal), mineral fertilizers of natural origin (rock phosphate, potassium sulphate, calcium carbonate) and microbial products. All inputs must be certified by an approved control body (ECOCERT, CAAE, IMO, etc.). Manufacturers must provide a conformity certificate for each product. Ecoganic products are certified by ECOCERT and carry CE 2018/848 approval for all products in the range.
Can organic fertilizers certified in Europe be used in Latin American organic production?
Yes, in most cases. Latin American organic certification bodies increasingly recognise equivalence with CE 2018/848 and NOP USDA standards, particularly for export-oriented producers targeting European or North American markets. In Argentina (SENASA), Chile (SAG) and Mexico (SENASICA), CE 2018/848-certified inputs can generally be used in organic production destined for export to the EU, provided the importer's certification body accepts the European standard. Products carrying both CE 2018/848 and NOP USDA certifications have the broadest acceptance across all markets. Always confirm with your local certification body before using any new input.
What is the role of unicellular algae in organic fertilization?
Freshwater unicellular microalgae such as Chlorella and Scenedesmus serve as the biological base of algae-based biostimulants used alongside organic fertilizers. They contribute natural phytohormones (auxins, cytokinins, gibberellins) that stimulate root growth and nutrient uptake; amino acids that chelate micronutrients and act as direct plant growth promoters; and polysaccharides that improve soil structure and water retention. Unlike marine algae (e.g. Ascophyllum nodosum), freshwater unicellular algae are grown under controlled conditions, are entirely chloride-free, have a consistent batch-to-batch composition and are safe for salt-sensitive crops (avocado, blueberry, strawberry). Ecoganic uses exclusively freshwater unicellular algae in its biostimulant formulations.
