Replenish Soil Biology with
Biological Fertiliser Solutions
Soil health is not just about how much nutrient is present in the soil, but how effectively those nutrients are made available to the plant. Biological approaches focus on improving this availability through maintaining healthy soil biology.
Liquid Fish and Seaweed Biological Fertilisers provide a premium soil care solution. Made using a biological fermentation process, these ocean-sourced mineral concentrates boost soil health and crop nutrition by introducing a combination of organic minerals and beneficial microbes.
These mineral and microbial inoculants trigger microbial activity in the soil, breaking down organic matter and delivering nutrients in a plant-available form. Healthier plants, nourished by organic nutrition and beneficial microbes, lead to stronger more resilient crops, and more nutritious produce.
Supporting your soil’s biology builds a solid foundation for long-term farm success
How We Make Biological Fertilisers
SONIC Liquid Fish and SONIC Liquid Seaweed Biofertilisers are made using a biological fermentation process, which preserves the integrity of the ocean fish and seaweed ingredients, so the final products are rich in organic nutrients and beneficial microbes.
Every batch is made fresh for every order
Drawing on more than 15 years of hands-on experience, we bring together naturally occurring minerals and microbial cultures in products supplied ready-made or produced on your farm with our training and support.
Choose Your Supply Option
Starter Cultures
Our proprietary microbial cultures are an integral part of SONIC’s liquid fish and seaweed biofertilisers. Developed through years of hands-on production experience, they are used within our carefully managed biological process.
For farmers producing on-farm, SONIC supplies the cultures alongside training and technical support.
Unlock the Superpower of Soil Microbes
How Do Biofertilisers Benefit the Soil?
Biological fertilisers are a soil amendment with both microbial fertiliser and mineral fertiliser effects.
Productive soil relies on both nutrients and the living organisms that cycle them. Bacteria and fungi break down organic matter and help make nutrients available to plants.
Biological fertilisers contribute naturally occurring minerals and organic materials that can feed this microbial activity. They bring a biological approach, supporting the processes that connect soil, organic matter and plant nutrition.
Benefits of Boosting Beneficial Microbes in the Soil:
- Enhanced nutrient cycling
- Improved plant immunity
- Fix atmospheric nitrogen
- Healthy seed germination
- Improved soil structure and aggregation
Bring Your Soil Back to Life with ‘Living’ Fertilisers
What Makes Biofertilisers Different?
Biological fertilisers work in a fundamentally different way to conventional synthetic inputs. Rather than supplying nutrients in a readily available synthetic (chemical) form, they focus on supporting the living processes within the soil that naturally create fertility over time.
At the centre of this approach are beneficial microbes—bacteria, fungi, and other soil organisms—that help drive the cycles that plants depend on. These microbes don’t just sit in the soil; they actively interact with plant roots, organic matter, and minerals to improve how nutrients are accessed and used.
When these biological systems are functioning well, they help:
- Enhance nutrient cycling, making nutrients already in the soil more available to plants over time
- Support plant health, through improved root function and natural plant-soil interactions
- Improve water retention, as healthier soil structure allows better infiltration and moisture holding capacity
Instead of acting as a direct feed to the plant, biological fertilisers work more like a catalyst—helping the soil system perform the work it is already capable of doing, but more efficiently.
Beneficial Microbes – The Workforce In Your Soil
Soil biology plays a crucial role in the availability and absorption of nutrients by plants, plus so much more:
- Microbial Activity
Soil microbes break down organic matter (like dead plant and animal material) into simpler forms of nutrients, making them accessible to plant roots. Without microbes, many of these nutrients would remain locked in organic forms and unavailable to plants. - Symbiotic Relationships
Certain microbes, such as mycorrhizal fungi, form symbiotic relationships with plant roots, enhancing the plant’s ability to absorb water and nutrients (especially phosphorus). In return, plants supply the fungi with carbohydrates. - Nutrient Cycling
Soil microbes are integral in the nutrient cycle. They help decompose organic material, release minerals and nutrients, and create healthy soil conditions, which directly influence which nutrients plants can absorb. - Nutrient Availability
The activity and diversity of soil organisms determine the types of nutrients that are available in the soil at any given time. For example, some microbes convert nitrogen in the air into forms that plants can use, while others make phosphorus more accessible. - Influence on Soil pH
Soil microbes can also affect the pH of the soil, which in turn affects nutrient availability. For instance, some microbes acidify the soil slightly, making certain minerals (like iron and manganese) more accessible to plants.
In summary, healthy soil biology is a key factor in nutrient availability, and plays a significant role in determining the nutrients plants absorb.
Why Use Liquid Seaweed and Fish Biological Fertilisers?
Liquid seaweed and fish biological fertilisers are used because they provide both plant nutrition and support for soil biology.
Unlike synthetic fertilisers that deliver nutrients in a direct chemical form, these biological fertilisers supply a combination of bioavailable nutrients and beneficial microbes.
Liquid fish fertiliser is particularly rich in organic nitrogen and amino acids that support growth, while liquid seaweed contains trace elements and natural plant compounds that help with stress tolerance and overall plant health.
Used together, they provide a balanced approach that can support both immediate plant needs and longer-term soil function.
Biological Fertilisers encourage earthworms, fungi, bacteria and other beneficial organisms to thrive
Healthy, biologically active soils don’t just improve plant nutrition – it also helps to enhance drought resilience, water infiltration, and soil structure for better overall growing conditions.
FAQs
SONIC Biofertiliser Solutions FAQs
SONIC Liquid Fish and Seaweed Biological Fertilisers feed both your plants and your soil, so you get short-term growth support and long-term gains in soil health.
Farmers typically use them to:
- Give plants fast-available nutrients
- Feed and stimulate beneficial soil microbes
- Improve nutrient cycling in the soil
- Strengthen root development and crop resilience
- Build soil structure and long-term fertility
Fish is rich in organic nitrogen and amino acids that drive growth. Seaweed adds trace elements and natural plant compounds that help crops handle stress. Used together, they can cover both what your plants need now and what your soil needs long-term.
See it on a real farm: Simon’s Pasture Improvement Journey →
Read article Top 3 Strategies To Get The Most From Your Biological Fertilisers
It mainly comes down to how much liquid fish and seaweed you use and how hands-on you want to be.
Made-to-order is the better fit if you:
- Use smaller volumes, or are trying biofertiliser for the first time
- Want a finished product delivered, ready to dilute and apply
- Don’t have the time or space to run your own batches
Our liquid fish and seaweed is made-to-order, priced by volume – $2.30–3.90/L, with a 180L minimum per product.
Making your own is the better fit if you:
- Want the lowest cost per litre (from $1.00–1.20/L after your first batch training)
- Want to cut freight costs and rely less on outside supply
- Like the idea of producing fresh biological products on your own farm
Starter packages start from $1,885 for a 540L system, with 1:1 training and VIP support through your first three batches.
Not sure? Book a free strategy call and we’ll help you work out which option saves you more.
Book a free strategy call → | Calculate Your Biofertiliser Usage →
Yes. SONIC biofertilisers are 100% natural and can be added to most farming programs, whether you’re fully regenerative or just starting to cut back on synthetic inputs.
Works well with:
- Other natural inputs, such as compost, manures, biodynamic preparations and natural amendments
- Seed treatments, soil drenches and foliar sprays
- Regenerative management practices
Keep separate from:
- Synthetic fertilisers, urea and chemical-based products. Mixing them in the same tank reduces the benefit, because these products can harm the beneficial microbes in your biofertiliser.
Yes. We supply farms across most regions of Australia, from our base in Dorrigo, NSW and Central Coast, NSW.
Made-to-Order Biofertiliser:
Freight is quoted to your farm based on your location and order size. Because you’re shipping finished liquid, freight can be a big part of the total cost, especially for remote farms or large volumes.
DIY Biofertiliser Systems:
We ship dried raw ingredients rather than liquid, which is much lighter and cheaper to freight. Containers and pumps can usually be bought locally, and training can be done by live video, so wherever your farm is, you can get started.
Your quote will confirm freight costs and delivery timing for your area.
Questions?
Refined on Australian Farms Since 2011
