5 Key Benefits of Using Fermentation To Make Biofertiliser (And Why Training Matters)

It’s not just what’s in the tank, it’s what happens inside it

Fish and seaweed have long been recognised as valuable sources of nutrients and naturally occurring compounds that can support plant growth. But how these raw materials are processed can make a significant difference to the characteristics of the finished product.

Fermentation is a biological process that uses microbial activity to transform organic materials. Rather than simply extracting or mixing ingredients, fermentation creates an environment where microorganisms interact with and break down components of the raw materials.

For farmers looking beyond conventional fertiliser inputs, biologically activated fermented fish and seaweed products offer an interesting approach to supplying nutrition and supporting biological activity in farming systems.

So what makes fermentation worthwhile, and why does the process matter?

Here are five important benefits.

1. Biological activation: More than just extracting nutrients

One of the key differences between fermentation and simple extraction is the involvement of microorganisms.

During fermentation, microbial communities interact with the organic materials, breaking down more complex components and producing a range of fermentation-derived compounds.

Depending on the raw ingredients and fermentation conditions, these can include organic acids, enzymes and other microbial metabolites.

The result is a biologically transformed product, rather than simply a liquid containing extracted nutrients.

This is an important distinction when considering the role of fermented biofertilisers in biologically managed farming systems.

2. Breaking down organic materials and making nutrients more accessible

Fish and seaweed contain a complex range of organic compounds, including proteins, amino acids, carbohydrates and minerals.

Fermentation encourages microbial processes that break down some of these more complex organic materials into simpler compounds.

For example, proteins can be broken down into peptides and amino acids through microbial and enzymatic activity.

This transformation is one of the reasons fermented fish products are valued as a source of organic nitrogen compounds and other nutritional components.

Rather than relying solely on the nutrient content of the original raw material, fermentation changes the composition of the finished product.

3. Supporting biological activity in the soil and around the plant

Healthy soils are living systems, with bacteria, fungi and other microorganisms involved in nutrient cycling, organic matter breakdown and soil structure.

Biologically activated fermented fish and seaweed products can contribute organic compounds and, depending on processing and storage, microbial activity to the farming system.

Seaweed also contains naturally occurring compounds that are of interest in plant physiology, while fish-derived products provide a range of organic nutritional components.

When incorporated into a broader soil and pasture management program, these products offer another way to support biological processes.

For livestock and pasture farmers, this is particularly relevant when considering the relationship between soil biology, nutrient cycling and productive pastures.

4. Freshness: Produce it closer to when and where it’s needed

Fermentation doesn’t stop being important once the product is made. What happens afterwards matters too.

Biologically activated products can continue changing during storage. Microbial activity, temperature and storage conditions all influence the characteristics of the finished product over time.

This is where producing your own on-farm offers an advantage.

Rather than purchasing finished liquid products that may have already spent considerable time in storage and transport, farmers can manage their own production and decanting schedules.

You can produce batches according to your requirements, store them appropriately and have greater control over the age and handling of the finished product.

It also means less need to transport large volumes of finished liquid fertiliser over long distances.

5. Control and consistency: Understanding what goes into the process

Fermentation is a biological process, and the outcome depends on how it is managed.

The quality of the raw ingredients, processing conditions, fermentation time and handling all influence the finished product.

Producing your own means you have greater visibility over these factors.

You know which ingredients are being used, how the batch is processed and when it is ready to decant.

With an established process, you can work towards consistent production rather than relying on an unknown manufacturing and storage history.

For farmers, this knowledge is valuable. You’re not just purchasing a fertiliser; you’re understanding how it is made and what contributes to its quality.

Why training matters: Fermentation is a process, not a recipe

While fermentation has many advantages, successful production isn’t simply a matter of combining ingredients and leaving them to sit.

It requires an understanding of the biological processes taking place and how to manage them.

Temperature, processing time, ingredient quality, fermentation conditions and recognising the signs of a healthy batch all matter.

Getting these things wrong can affect the quality of the finished product and lead to inconsistent results.

This is why training is so important.

At SONIC Natural Farming, we’ve spent more than 15 years producing and using liquid fish and seaweed biofertilisers on Australian farms. Our production systems have been refined through years of practical experience.

We provide hands-on training so operators understand:

• How to prepare and manage their fermentation batches.

• What to look for as fermentation progresses.

• How to recognise when a batch is ready for decanting.

• How to maintain the process and achieve consistent quality.

• How to store and handle the finished product.

The objective is to give farmers the knowledge and confidence to manage their own production, not simply hand them a set of instructions.

Conclusion: The value is in the process

Fermentation is much more than a way to turn raw ingredients into liquid fertiliser. It is a biological process that transforms organic materials through microbial activity, producing a complex finished product with nutritional and biological characteristics.

For farmers, understanding that process opens up opportunities to take greater control over the quality, freshness and production of their liquid fish and seaweed biofertilisers.

And while the benefits of fermentation are significant, the quality of the outcome ultimately depends on understanding how to manage the process.

It’s not just about making your own fertiliser. It’s about understanding the biology behind it.