For professional farmers, the best organic fertilizer brand is the one that delivers consistent nutrient content, certified inputs and reliable supply, season after season. Several established companies specialise in organic and biological crop nutrition, from Italy to India to the United States. This guide introduces some well-known names, the product types they cover, and the questions to ask before you buy in bulk.
Brands are listed for information, not as an endorsement. Always compare products on their technical data.
Types of organic fertilizer used commercially
| Type | Main benefit | Typical use |
|---|---|---|
| Compost and vermicompost | Organic matter, soil structure | Land preparation, nurseries |
| Pelleted manure | Balanced, slow-release nutrients | Field crops, orchards, vineyards |
| Blood meal | Fast organic nitrogen | Leafy crops, early growth |
| Bone meal | Phosphorus and calcium | Planting, fruit and flowering crops |
| Fish-based fertilizers | Nitrogen, amino acids | Drip and foliar programmes in horticulture |
| Seaweed extracts | Trace elements, plant growth compounds | Foliar sprays at stress periods |
| Biofertilizers | Beneficial microbes | Seed and soil treatments |
See bone meal vs blood meal and blood and bone fertilizer.
Well-known organic fertilizer companies
ILSA (Italy)
An Italian company known for organic nitrogen fertilizers made from hydrolysed animal proteins, and for biostimulants. Widely used in European horticulture and fruit growing.
Hello Nature, formerly Italpollina (Italy)
Known for pelleted organic fertilizers based on composted manure and for plant-based biostimulants, sold internationally.
Rallis India (Tata group)
An Indian agricultural inputs company covering crop protection and plant nutrition, with a wide distribution network across rural India.
Midwestern BioAg (United States)
Focused on soil health and biological farming, combining mineral nutrition with biological products for field crops and livestock farms.
Suståne (United States)
Produces compost-based, slow-release natural fertilizers used in turf, horticulture and agriculture.
Fertrell (United States)
Supplies organic fertilizers, mineral blends and livestock nutrition products, widely used on certified organic farms in the US.
What to check before buying in bulk
- Guaranteed analysis: N-P-K, organic matter and organic carbon, stated on the label or data sheet
- C:N ratio: affects how quickly nitrogen is released
- Moisture: high moisture adds weight and storage risk
- Pathogen control: proof of proper composting or heat treatment for manure-based products
- Heavy metals: test results against the limits in your market
- Certification: input approval for organic farming in your market, such as listing by OMRI in the US or compliance with the EU organic regulation
- Consistency: batch-to-batch analysis, not just a single sample
- Supply: capacity, lead times and packaging for your season
Organic NPK and liquid organics
Organic NPK products combine organic nitrogen with phosphorus from bone meal or rock phosphate and potassium from natural minerals. Liquid organics, such as fish hydrolysates, amino acids, humic substances and seaweed extracts, fit drip irrigation and foliar programmes in greenhouses and orchards.
Organic fertilizers are generally lower in nutrients than mineral fertilizers, so many professional growers combine them. See types of fertilizers and organic vs chemical fertilizers.
Biofertilizers
Biofertilizers contain beneficial microorganisms such as Rhizobium, Azospirillum, phosphate-solubilising bacteria and mycorrhizal fungi. They can improve nutrient availability and root development, but results depend on soil conditions, so trial them on your own fields first.
Bulk supply through Agromer
Agromer is an international commodity trader based in France since 1985. We supply blood and bone fertilizer and other fertilizers in bulk to distributors and agricultural buyers. Send us the product, specification, quantity, packaging and destination. See fish, blood and bone fertilizer and our fertilizer range.
Frequently asked questions
What is the best organic fertilizer brand?
There is no single best brand. Compare products on guaranteed analysis, certification, heavy metal testing, consistency and supply reliability.
Which organic fertilizers are used in commercial farming?
Compost, pelleted manure, blood meal, bone meal, fish fertilizers, seaweed extracts and biofertilizers are all common.
What certifications should organic fertilizers have?
That depends on your market. In the US, OMRI listing is common. In the EU, inputs must comply with the EU organic regulation.
Are organic fertilizers enough for high yields?
They improve soil health but are low in nutrients. Many commercial growers combine them with mineral fertilizers, unless they farm under organic certification.
What is an organic NPK fertilizer?
A product that supplies nitrogen, phosphorus and potassium from organic and natural mineral sources, such as blood meal, bone meal and natural potash.
Why test organic fertilizers for heavy metals?
Some raw materials can contain heavy metals. Testing protects soil, crops and export certification.