Liquid Seaweed Biofertiliser
Liquid Mineral Soil Amendment
- Naturally occurring minerals
- Made with microbial cultures
- No artificial additives or preservatives
- Made-to-order bulk supply—minimum 180 L
- DIY systems, ingredients, training
*Limited stock available. Made to order (allow 10–12 weeks for processing). Contact us for availability.
SONIC Liquid Seaweed
Biofertiliser
Pricing Guide
Choose your Supply Option
MADE-TO-ORDER PRODUCTS
$2.30-3.90/L
We make your liquid fish and seaweed biofertiliser and deliver it to your farm.
Indicative product price: $2.30–$3.90/L
Includes: Finished liquid product, ready to dilute and apply.
Minimum order: 180L per product
Freight: Quoted for delivery to your farm.
Availability: Limited stock. Made-to-order production generally takes 10–12 weeks.
Contact us before planning your application.
*Prices are indicative and in Australian dollars. Your quote confirms the total cost, GST, freight, inclusions and availability.
ON-FARM PRODUCTION & TRAINING
$1.00-1.20/L
You make your liquid fish and seaweed biofertiliser with our production system and guidance.
Indicative first batch price range: $1.80–$3.50/L including setup and training. Your price depends on system size and package requirements.
Subsequent batches price range: $1.00–$1.20/L. Your quote explains the ingredients and costs included.
Starter package includes: Production equipment, raw ingredients, assisted setup, one-to-one training and support through your first three batches.
Your involvement: You run the system, monitor the batches with our guidance and prepare the finished product for use.
Best suited to: Farmers who want to save on organic soil amendments, product shipping and container costs.
*Prices are indicative and in Australian dollars. Your quote confirms the total cost, GST, freight, inclusions and availability.
SONIC Seaweed Biofertiliser — Suggested Rates
| Crop / System | Typical Rate or Dilution | Application |
|---|---|---|
| Seed inoculation | 1:80–1:150 dilution | Light seed coating before sowing |
| Seedlings / microgreens | 1:100–1:200 dilution | Foliar spray or soil drench during establishment |
| Cover crops | 2–5 L/ha | During establishment and early growth |
| Vegetables | 3–8 L/ha | During establishment and crop growth |
| Turf / lawns | 3–10 L/ha | During active growth and recovery after mowing |
| Vines | 4–8 L/ha | During flowering and fruit development |
| Fruit & nut trees | 5–10 L/ha | During active growth and flowering |
| Broadacre crops | 2–6 L/ha | During establishment and early growth |
| Fertigation | 1–5 L/ha equivalent | Through irrigation system as required |
| Grazing / pasture | 3–8 L/ha | During pasture growth and recovery after grazing |
Liquid Seaweed — Indicative Cost per Hectare
Costs shown are indicative product costs per hectare, per application, based on made-to-order pricing of $2.30–$3.90/L and ongoing DIY production costs of $1.00–$1.20/L. DIY costs exclude the one-off starter fee for initial setup and training. Your quote confirms that fee, GST, freight and inclusions.
Rates refer to undiluted product. See rates and methods.
| Product Rate | Made-to-Order Cost/ha | DIY Ongoing Cost/ha |
|---|---|---|
| 1 L/ha | $2.30–$3.90 | $1.00–$1.20 |
| 2 L/ha | $4.60–$7.80 | $2.00–$2.40 |
| 3 L/ha | $6.90–$11.70 | $3.00–$3.60 |
| 4 L/ha | $9.20–$15.60 | $4.00–$4.80 |
| 5 L/ha | $11.50–$19.50 | $5.00–$6.00 |
| 6 L/ha | $13.80–$23.40 | $6.00–$7.20 |
| 8 L/ha | $18.40–$31.20 | $8.00–$9.60 |
| 10 L/ha | $23.00–$39.00 | $10.00–$12.00 |
SONIC Liquid Seaweed Analysis
SONIC Natural Farming biofertilisers are biologically fermented products intended to support soil biology and complement your farm’s nutrition program.
The table below presents mineral and microbial figures from previous product testing. Naturally sourced ingredients and fermentation can contribute to variation between batches. These figures are a guide, rather than guaranteed specifications for every batch.
SONIC Liquid Seaweed Analysis
| Nutrient | Amount (mg/L) |
|---|---|
| Nitrogen (N) | 1040 |
| Phosphorus (P) | 100 |
| Potassium (K) | 1600 |
| Sulphur (S) | 700 |
| Calcium (Ca) | 800 |
| Magnesium (Mg) | 500 |
| Sodium (Na) | 700 |
| Iron (Fe) | < 50 |
| Manganese (Mn) | 3.6 |
| Zinc (Zn) | 2.7 |
| Copper (Cu) | 1 |
| Cobalt (Co) | 0.1 |
| Boron (B) | 5 |
| Molybdenum (Mo) | 0.2 |
| Selenium (Se) | 0.05 |
| Iodine (I) | 2.79 |
| Microbes | Amount (CFU/g) |
| Lactic Acid Bacteria | 4200000 |
| Total Active Fungi | 2000 |
| Yeasts | 2000000 |
Mineral content and microbial counts describe the tested material and do not, by themselves, predict results on your farm. Consider them alongside application rates, storage conditions and cost per hectare.
Product Storage
SONIC Biological Products contain no artificial additives or preservatives and provide maximum efficacy when used within 3 months from the purchase date. This helps maintain strong microbial activity and ensures the full range of biological benefits remains available at application.
Biological Products should not be stored in a diluted form.
Feed your crops with 100% natural Liquid Seaweed (Kelp) Fertiliser containing organic minerals, trace elements, vitamins, carbohydrates, amino acids, essential fatty acids, growth factors and anti-oxidants. With seaweed’s natural alginates, it also provides superior gelling properties that provide moisture holding abilities in the soil.
- Diverse Uses: Beneficial for mixed crops, natives, orchards, fruit trees, and pasture.
- Strengthens Plants against environmental stresses including drought, salty soil and frost.
- Root Stimulation: Supports strong roots and early growth.
- Assists Chlorophyll Production: Healthier, greener plants.
- Promotes Nutritional Value: Can accentuate taste, aroma and extend shelf life.
- 100% Biodegradable: Leaves no toxic residue in soil, requires no withholding period.
SONIC Liquid Seaweed Organic Fertiliser for plants is derived from Australian Durvillaea Potatorum (Bull Kelp), and made with beneficial microbe cultures. No fillers, additives or preservatives.
Biological Fertiliser FAQs
Conventional synthetic fertilisers are designed to deliver nutrients rapidly, creating fast and predictable plant responses. When nitrogen, phosphorus, and potassium are applied in synthetic forms, plants often respond with quick greening and a surge in biomass.
Biological fertilisers, on the other hand, work in a fundamentally different way to conventional synthetic inputs. Rather than supplying nutrients in a readily available chemical form, they focus on supporting the living processes within the soil that naturally create fertility over time.
Read article Rethinking Soil Fertility: The True Meaning of Fertiliser
These products begin working immediately by stimulating soil biology and delivering bioavailable nutrients. Results vary depending on soil condition and management practices.
Early benefits such as improved seed germination and plant establishment can be seen quickly, while longer-term improvements—particularly in grazing systems—build over one to three years. In horticulture and orchards, growers often notice improved growth, quality, and extended shelf life of produce with regular use.
Read more about SONIC Biological Fertilisers
Liquid seaweed extracts, such as Seasol, are usually produced using chemical or heat extraction to concentrate certain compounds. While these products are widely used, the process can reduce some of the natural components of the seaweed. Seaweed biofertiliser, on the other hand, is cold fermented, preserving a wider range of nutrients and natural compounds in a form that supports soil biology and plant uptake.
Read Article – Liquid Seaweed Fertiliser Comparison: Ferment Vs Extract
We service all regions across Australia for both product supply and on-farm production systems. Fresh processed biological fertilisers are delivered nationwide.
For on-farm systems and training, we work with both local and remote operations. Where in-person visits aren’t practical, we provide live video training and guided setup to ensure you can confidently get your system up and running without a hitch.
We source both fresh and dried fish waste, generated after processing for human consumption, from a network of fish shops and processors handling ocean-caught fish across Australia. By utilising these by-products, we help divert organic waste from landfill and repurpose it into valuable liquid fish hydrolysate biological fertiliser.
Read article Turning Fish Waste Into Premium Hydrolysate Fertiliser
SONIC biological fertilisers can help balance soil pH over time by improving overall soil function. The microbes in our biologically fermented fertilisers enhance nutrient cycling and soil structure, which can help buffer pH fluctuations and create more balanced soil conditions.
Rather than directly changing soil pH like lime or other amendments, biological fertilisers work by supporting the natural processes that help maintain a more stable and productive soil environment.
Read article Adjusting Soil pH on Australian Farms (and Why Microbes Matter)
SONIC Liquid Fish and Seaweed Biological Fertilisers are used because they provide both plant nutrition and support for soil biology, helping improve overall soil health and plant performance.
Key benefits include:
• Providing fast-available nutrients for plant uptake
• Feeding and stimulating beneficial soil microbes
• Supporting nutrient cycling within the soil
• Improving root development and crop resilience
• Enhancing soil structure and long-term fertility
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 supports both immediate plant needs and longer-term soil function.
Read article Top 3 Strategies To Get The Most From Your Biological Fertilisers
DIY SYSTEM COST SAVINGS
You really can see the difference, just driving up the road. We’re happy, and it has actually saved us a lot of money on extra fertilisers.
One key benefit of using Liquid Seaweed Biological Fertiliser is its bio-available nutrient content. Seaweed is packed with essential minerals, including nitrogen, phosphorus, potassium, and trace elements such as iron, zinc, and magnesium.
These nutrients are vital for healthy plant development and are readily absorbed by plants, as a biofertiliser, promoting robust root growth, improved flowering and fruiting, and overall plant vigour.
Alongside containing essential elements, Liquid Seaweed Biological Fertiliser also contains micronutrients such as iron, copper, zinc, molybdenum, boron, manganese and cobalt.
Plants use tiny amounts of the micronutrients, often measured in parts per million, which is why Liquid Seaweed Fertiliser can be highly effective in delivering these micronutrients to crops.
Due to a variety of beneficial compounds such as cytokinins, auxins, gibberellins, and betaines, Liquid Seaweed Biologiacl Fertiliser can positively impact photosynthesis by stimulating the growth of chlorophyll pigments responsible for capturing light. This results in increased absorption of sunlight and more efficient conversion of carbon dioxide into carbohydrates.
SONIC LIQUID SEAWEED
More Than Just a Fertiliser
SONIC Liquid Seaweed Biological Fertiliser is a naturally balanced nutrient solution that offers a wealth of benefits for your farm, garden and plants. Derived from 100% Australian organic seaweed (kelp), this seaweed liquid fertiliser contains over 60 essential elements.
The fermentation process used to create SONIC Liquid Seaweed breaks down the complex compounds in the seaweed into simpler, more bioavailable forms. This allows the nutrients to be quickly absorbed and used by your plants, leading to improved nutrient uptake and healthier growth.
The minerals and trace elements in SONIC Liquid Seaweed Fertiliser is in a form that plants can readily access, making this organic liquid seaweed fertiliser highly efficient and effective for nourishing your crops.
Unlike synthetic fertilisers, SONIC Liquid Seaweed Biological Fertiliser for plants provides a holistic approach to nourishing your crops. The diverse array of macro and micronutrients work synergistically to support strong root development, vibrant foliage, and nutrient-dense fruit. Regular application can also enhance a plant’s natural defense mechanisms against environmental stresses and disease.
Whether you’re caring for pastures, vegetables, flowers, trees, or houseplants, incorporating Liquid Seaweed Biological Fertiliser into your regimen, it is an excellent way to give your plants the balanced organic nutrition they needs to thrive.
SEAWEED BIOLOGICAL FERTILISER BENEFITS
Delivers Organic Minerals and Trace Elements
One key benefit of using Liquid Seaweed (Kelp) Fertiliser is its rich organic nutrient content. Seaweed is packed with essential minerals, including nitrogen, phosphorus, potassium, and trace elements such as iron, zinc, and magnesium. Because of the cold fermentation process, these essential nutrients are bio-available and readily absorbed by plants, promoting robust root growth, improved flowering and fruiting, and overall plant vigor.
Contributes to Soil Structure
Liquid Seaweed Biological Fertiliser has the ability to promote better soil structure. When applied to the soil, under brown or green ground cover, the compounds present in seaweed help bind soil particles together, resulting in improved soil aggregation. The enhanced soil structure allows for better water infiltration and retention, reducing the risk of erosion and improving overall soil health.
Provides Natural Growth Hormones
When Liquid Seaweed Fertiliser is applied to plants, the natural growth hormones, such as auxins, cytokinins, and gibberellins, play a crucial role in regulating various physiological processes in plants, including cell division, elongation, and differentiation.
Enhances Taste, Colour and Nutritional Content of Food
One of the key advantages of using Liquid Seaweed Fertiliser is its impact on taste. It has been found that plants treated with Seaweed Biological Fertiliser have improved flavour profiles compared to those grown with chemical-based fertilisers. The natural compounds present in seaweed can enhance the overall taste and aroma of fruits, vegetables, and other edible crops.
In addition to enhancing taste, Liquid Seaweed Fertiliser also contributes to enhancing the colour and texture of food. The minerals and trace elements found in seaweed help plants develop vibrant colours, and improve the visual appeal of fruits and vegetables.
Moreover, Liquid Seaweed Fertiliser is known for its ability to enrich the nutritional content of food.
Seaweed Kelp is rich sources of essential minerals such as potassium, magnesium, calcium, iron, and iodine. When used as a liquid fertiliser for plants, these nutrients are absorbed by the crops and subsequently passed on to consumers when they consume these foods.
Increased Plant and Crop Resilience
Another key advantage of using Liquid Seaweed Fertiliser is its ability to boost a plant’s immune system. Seaweed Kelp is rich in bioactive compounds such as polysaccharides, amino acids, and vitamins that stimulate the production of plant defense mechanisms. These compounds help plants to build stronger cell walls, activate defense genes, and produce antimicrobial substances that can fend off diseases and pests.
Liquid Seaweed Biological Fertiliser can also help in enhancing plant tolerance to climatic stresses such as drought, salinity, and extreme temperatures. Seaweed Kelp contains osmoprotectants that help plants retain water during dry periods or excessive salt exposure. Seaweed also contains antioxidants that scavenge harmful free radicals produced under stressful condition.
The organic nature of SONIC Liquid Seaweed Biological Fertiliser makes it an environmentally friendly choice for gardeners and farmers alike. Furthermore, it does not contain synthetic chemicals or harmful additives that can have negative impacts on soil health, the natural ecosystem, or water quality.
Click here to read ‘Key Benefits of Using Liquid Seaweed Fertiliser for Plants’
Ready To Transform Your Soil?
5 ha Avocados at Kilburney Farm, Central Coast, NSW, using regenerative farming principals, GreenBlower Mulch and SONIC Liquid Fish and Seaweed Biological Fertiliser, (Above image).
GREAT RESULTS
If I see something once and something that dramatic, I know it’s got to be doing good.
How Does Liquid Seaweed Biological Fertiliser Work?
SONIC Liquid Seaweed (Kelp) Biological Fertiliser is a unique product that harnesses the power of both beneficial microbes and the natural chelating properties of seaweed. This combination works to release locked-up minerals in the soil, making them more readily available for plant uptake.
The key lies in the synergistic relationship between the microbes and the seaweed. The microbes help to break down organic matter, freeing up essential nutrients like nitrogen, phosphorus, and potassium. Meanwhile, the seaweed’s natural chelating ability binds to these nutrients, preventing them from being leached away or becoming unavailable to plants.
This dual-action approach ensures that your plants have access to the vital organic minerals they need to thrive, without the risk of nutrient deficiencies or imbalances. By applying Seaweed Biological Fertiliser, you can support overall soil health and fertility, leading to stronger, more resilient plants.
Containing the hormones gibberellin and auxin, SONIC Liquid Seaweed Fertiliser functions as a growth enhancer, as well as delivering naturally balanced vitamins, enzymes, and over 60 trace elements. Liquid Seaweed promotes early growth, improves root and stem strength, and contributes to cold hardiness in plants.
Boost Soil Health by Stimulating Beneficial Microbes
When applied to the soil, Liquid Seaweed Biological Fertiliser stimulates soil bacteria. An increase in biological activity in the soil has many benefits including increased soil fertility, strong growth in plants, and natural plant immunity.
See Article – ‘Top 7 Benefits of Using Seaweed in Agriculture’
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