Organic fertiliser
Nutrients are derived primarily from organic materials. Analysis, nutrient availability and release can vary substantially by source and processing.
Grower's guide
What is organo-mineral fertiliser?
A clear guide to the category, how formulations differ, and what Australian growers should ask before putting a product into a nutrition program.
Organo-mineral fertiliser is a formulated fertiliser that brings organic material and mineral nutrients together in one product. The organic fraction supplies an organic matrix; the mineral fraction supplies declared plant nutrients. The composition, nutrient forms, release behaviour and intended use vary by formulation. Therefore, “organo-mineral” describes a category, not a guarantee of any particular field result.
The category
One product, two nutrient sources.
Organo-mineral fertilisers sit between wholly organic inputs and conventional mineral fertilisers. Research commonly describes them as formulations combining organic feedstocks or soil-improving materials with mineral nutrients. They can be produced as granules, pellets or liquids, and may be uncoated or controlled release.
The term is also written as organo mineral fertiliser, organomineral fertiliser and, in US English, organo-mineral fertilizer. On this site we use the hyphenated Australian spelling: organo-mineral fertiliser.
Mineral fertiliser
Supplies nutrients in defined mineral forms and concentrations. It may be immediately available, stabilised or delivered through a controlled-release system.
Organo-mineral fertiliser
Combines an organic fraction with declared mineral nutrients in one formulation. The exact balance and manufacturing method determine how the product behaves.
Controlled-release organo-mineral fertiliser
Adds a release-control mechanism to an organo-mineral base. Release claims should be assessed against product-specific testing, not assumed from the category name.
How it works
Formulation matters more than the label alone.
Two organo-mineral fertilisers can have very different nutrient analyses, organic sources, physical forms and release profiles. A useful evaluation starts with the product specification and finishes with performance in the intended growing system.
Start with the nutrient analysis
Check total nutrient percentages, the forms in which those nutrients are present, and whether the analysis matches the crop and production stage.
Understand the organic fraction
Ask what the organic material is, how it is processed, how consistency is controlled and which characteristics are measured batch to batch.
Examine physical performance
Granule or pellet size, durability, bulk density, media distribution and dose uniformity can matter as much as headline analysis, particularly in small containers.
Verify release claims
For controlled-release products, request the test conditions, comparison product, release curve and evidence from a production system relevant to your crop.
Confirm application and documentation
Use the current label, technical data, safety documentation and agronomic advice. In Queensland, fertiliser labelling requirements include nutrient content and the form in which nutrients are present.
Product evaluation
Questions worth asking before a trial.
A credible supplier should be able to separate category evidence from evidence about its own formulation.
What exactly is declared?
- N, P, K and relevant secondary nutrients
- Nutrient forms and availability
- Organic material or carbon information
- Batch tolerances and quality controls
What is the intended use?
- Crop and production stage
- Container, field or protected cropping
- Application rate and placement
- Known format limitations
What has actually been measured?
- Crop response and assessment timing
- Nutrient release under stated conditions
- Comparison against the current program
- Complete results, including limitations
What does the claim apply to?
- The organo-mineral category generally
- The supplier's specific formulation
- A laboratory result
- A commercial production trial
Fenrow's approach: Fenrow combines recovered Australian organic material and mineral nutrients in a single controlled-release pellet. Product performance is assessed through a fixed side-by-side trial protocol. Category research is useful context, but it is not presented as proof of a Fenrow-specific outcome.
Australian use
Is organo-mineral fertiliser suitable for every crop?
No single formulation is right for every crop, soil, substrate or production format. Suitability depends on nutrient demand, soil or media properties, irrigation, container volume, placement, climate, release mechanism and the supplier's evidence.
Where Fenrow is focused today
Fenrow is developing its current range around production nursery pots and containers, tube stock and cells of at least 40 mm. These are the formats being assessed through its trial pathway.
Where extra care is needed
Very small plug cells constrain pellet dosing and distribution. In those formats, a pelletised organo-mineral fertiliser may sit alongside fertigation rather than replace it.
Common questions
Organo-mineral fertiliser FAQ.
Is organo-mineral fertiliser the same as organic fertiliser?
No. An organo-mineral fertiliser contains both an organic fraction and mineral nutrients. It should not be described as certified for organic production unless the specific product has current certification covering that use.
Is every organo-mineral fertiliser controlled release?
No. Controlled release is a separate product characteristic. Some organo-mineral fertilisers are coated or otherwise engineered to control nutrient release; others are not.
Does organo-mineral fertiliser replace conventional NPK?
It can supply mineral N, P and K, but whether it replaces all or part of an existing program depends on its analysis, application rate, nutrient availability, crop demand and trial evidence.
Does the organic fraction guarantee better soil health?
No category label guarantees a result. Published research discusses potential soil and nutrient-management benefits, but outcomes vary with formulation, organic substrate, soil, crop and management. Product-specific claims require product-specific evidence.
What spelling should Australian businesses use?
Use “organo-mineral fertiliser” for Australian audiences. Search engines understand closely related variants, so readable copy is more useful than repeating every spelling.
Sources and scope
Evidence behind this guide.
This page explains the category and Fenrow's stated development approach. It does not prescribe a fertiliser program or convert category research into a product-performance claim.
- European Journal of Agronomy (2025): a comprehensive review of organo-mineral fertiliser, soil health, crop yield and environmental considerations.
- Frontiers in Sustainable Food Systems (2024): a perspective on organo-mineral fertiliser opportunities, limitations and food-security context.
- Business Queensland: current Queensland fertiliser standards and labelling requirements.
Move from definition to evidence.
Compare Fenrow with your current program under a fixed protocol and success gates agreed before the trial begins.
Start a trial