When it comes to seed germination, the treatment of seeds with biological fertilisers has shown promising results in terms of faster germination rates. Biological fertilisers, also known as organic or natural fertilisers, are derived from organic sources such as seaweed, fish, and soil microorganisms.

In this article we look at the use of biological fertilisers on seeds and the number of benefits it provides that contribute to faster germination.

Why Accelerate Germination?

Faster seed germination has been observed in a number of studies using Liquid Biological Fertilisers, which is advantageous for farmers for several reasons;

Firstly, it allows plants to establish themselves more rapidly, giving them a head start over potential competition from weeds or adverse environmental conditions.

Additionally, faster seed germination can lead to more uniform plant growth across a field or garden bed.


Seed Germination

Accessing Natural Growth Stimulators

Seaweed contains more than 70 minerals, microelements, vitamins and enzymes. Natural ocean Seaweed (kelp) is rich in essential nutrients such as nitrogen, phosphorus, potassium, and trace elements like iron, zinc, and magnesium. These nutrients benefit healthy plant development, promoting robust root growth, improved flowering and fruiting, and overall plant vigor.

There are also benefits to using Biological Fertilisers produced from seaweed (kelp), as a seed inoculant prior to planting seeds.  Using Liquid Seaweed Biological Fertiliser is excellent for rapid seed germination, due to its own natural growth hormones such as auxins, cytokinins, and gibberellins. These hormones play a crucial role in stimulating cell division, elongation, and differentiation in plants, leading to faster and healthier growth.  

Read article ‘Benefits of Seaweed in Regenerative Agriculture’


Many seaweed fertiliser products today are manufactured using an extraction process.  The extraction process generally uses an alkali extraction agent, such as potassium hydroxide.  This process inevitably denatures a lot of the original compounds found in seaweed, which are known to have many beneficial uses for plants.

For example, seaweed has a compound called betaine osmoregulators. When applied to plants, in its original form, these osmoregulators make plants a lot more resilient to drought stress.  It allows the plant cells to regulate water much better, and require less water, which enhances the plants’ tolerance to stress.  Betaine osmoregulators are lost using an alkali extraction method. 

Cold processing, or natural fermentation, retains all the original compounds of seaweed, in a bio-available state.  Read about Biological Fermentation Here.

Inoculating seeds with ‘living’ biology such as beneficial bacteria and fungi, can also help to improve germination rates.  Furthermore, biological inoculants gives the young plant the optimal chance of surviving and thriving in its new environment.

Nature’s Seed Inoculants

Seeds that have been treated with natural Biological Fertiliser and biostimulants not only have a fast seed germination rate, but also help to improve strike rates.  This means a higher percentage of seeds germinate.  While this is also determined by the quality of the seeds, in many cases this has proven to be the case.

The Silent Communication of Microbes

When seeds are inoculated with biological stimulants, as they germinate, the biology sends out signals, indicating that there is a microbial rich environment.  The plant seedling responds to the biologically ‘alive’ environment, and recognises that it is naturally supported to grow.  And, as the plant grows, it performs better photosynthesis, and has the microbial support to help establish, and participate in, a broad biological communication network.

Using chemical fungicides on seeds does immense damage, not only to the soil, and the plant, but to its future seeds.  Fungicides inhibit young plants from accessing the biological communication network, and from sourcing the essential nutrients through them.


Beneficial Soil Microbes

Probiotics for Seeds

The best way to kick-start a biological soil/plant relationship is to inoculate seeds in a natural Biological Fertiliser that has been fermented in an anaerobic environment, using a diversity of active beneficial microbes.

Using (naturally) inoculated seeds, not only produces fast seed germination, but once in the ground the microbialy active fertiliser can trigger dormant microbes in the soil to ‘switch on’ through quorum sensing.  The seed then knows it is ‘biologically supported’ with a ‘microbial community’ available, and proceeds to grow with strength and immunity.

Liquid Seaweed BioFertiliser – Put To The Test

In a trial, we conducted an experiment using freshly fermented SONIC Liquid Seaweed Biological Fertiliser to raise a tray of seeds, comparing it to a control study tray that used only water. Our main focus was to observe the seed germination rates, growth rates, and visual seedling health.

One of the key factors we examined in this experiment was the speed of seed germination. 

Trial Details

From hand harvested, open-pollinated seeds, we chose 9 of each; purple lettuce, curly kale and nero kale, with a total of 27 seeds for each study.

The day before planting, we soaked half of the trial seeds in diluted Liquid Seaweed Biological Fertiliser, then all the seeds were planted at the same time, in the same type of growing medium.

The first day the seeds emerged it showed us that the seed strike rate was fastest, with a higher strike quantity, when they were pre-soaked in Seaweed Biological Fertiliser.

DAY 1 – Seaweed Biological Fertiliser:
26 out of 27 seeds presoaked in Biological Fertiliser emerged.

DAY 1 – Control Study:
2 out of 27 seeds in the control study emerged, and another 10 seeds emerged the following day.  A total of 12 out of 27 seeds in the control study eventually emerged.

Seaweed Biological Fertiliser Seed Treatment

DAY 8 – As the above image indicates, seeds grown using Seaweed Biological Fertiliser are further advanced, with a richer green colour, compared to the seedlings in the control study.

Trial Overview

By using the Liquid Seaweed Biological Fertiliser in our trial study, we aimed to determine if it could potentially enhance or accelerate the seed germination process compared to using water alone.

Throughout the observation period, we closely monitored both trays for any noticeable differences in terms of how quickly the seeds sprouted and developed into seedlings. This allowed us to assess whether or not the use of Liquid Seaweed Biological Fertiliser had any impact on the speed of seed germination.

The results obtained from this trial study showed that Liquid Seaweed Biological Fertiliser can be considered an effective tool for promoting faster seed germination rates. Such information can be vital for those seeking efficient methods to improve plant growth and maximise productivity in agricultural or horticultural settings.

How To Inoculate Seeds

  • Seeds can be pre-soaked in diluted Liquid Seaweed for 2-5 hours or overnight pre-planting.
  • Soil can be drenched with diluted Liquid Seaweed pre-planting.
  • Seeds can be sprayed with undiluted Liquid Seaweed, pre-planting.
  • Seeds can be watered with diluted Liquid Seaweed post-planting.
  • Seeds can be inoculated when passing through direct seeder machines such as Australia’s Ausplow Machines.

NOTE: Some seeds such as legumes should not be pre-soaked.

Seeding with Biological Fertiliser

Key Benefits of Seed Inoculation

  • When seeds are pre-soaked, and watered with SONIC Liquid Seaweed Biological Fertiliser, they have a much higher germination quantity and speed.
  • Seaweed contains a high concentration of plant hormones, which stimulate seed germination and growth.
  • Liquid Seaweed Biological Fertiliser, as a seed soak, means the roots of plants come into contact with beneficial organisms straight away, which can help to improve the plant’s health and vigour.
  • Early growth rates are faster.  Once out of the ground, seeds treated with Liquid Seaweed Biological Fertiliser grow stronger and bigger.
  • Seaweed contains a wide range of organic minerals and trace elements that are essential for plant growth.
  • The natural alginate in Seaweed can be a natural ‘repellant’ to excessive moisture/mould/algae.

Overall, treating seeds with biological fertilisers and biostimulants offers a natural approach to promoting faster germination rates. By providing essential nutrients, improving soil conditions, and enhancing microbial activity in the rhizosphere around the seeds’ roots, these fertilisers create an optimal environment for seed germination success.

Read Article – How to Prevent Mould and Algae on Seedlings


PODCAST: John Kempf interviews plant pathologist Dr. James White of Rutgers University, whose work provides a new perspective on plant pathology, susceptibility to soil-borne pathogens, and plant absorption of nutrients.

Regenerative Livestock Farming – Informational Videos

Beneficial Soil Microbes – Informational Videos

SONIC Natural Farming

On-Farm Production
& Bulk Supplies

You Might Also Like…

Top 7 Benefits of using Seaweed in Regenerative Agriculture

In regenerative agriculture, farmers aim to improve soil health and fertility while minimising their reliance on synthetic inputs. Seaweed serves as...

5 Ways to Build Soil Biology for Long Term Profitability

Building soil biology is a crucial aspect of sustainable agriculture and gardening practices. By encouraging the return of microbial life and...

Benefits of Fermentation for Biofertiliser Production

Fermentation is a process that has been utilised for centuries in various industries, including the production of biofertilisers. Biofertilisers are...

Cultivate Resilient Orchards Using Liquid Fish Hydrolysate

Crop resilience is a common goal for farmers following long-term visions.  As the resilience grows, the less the farmer has to work, and the more...

Discover How Microbes Diminish Odor in Biological Fertiliser

Most people, when they think of fertiliser, screw up their nose.  When we ask people if they want to smell our Seaweed Biological Fertiliser sample,...

How to Improve Animal Gut Health for Enhanced Feed Conversions

Animal feed conversion is the ratio of the amount of an animal feedstuff consumed divided by the weight gain of the animal. The efficiency of feed...

Turning Fish Waste into Premium Fish Hydrolysate Fertiliser

Global Fish Consumption Fish and marine products have long been recognized as one of the most popular sources of protein for human consumption. With...

What is Regenerative Agriculture?

Using natural farming methods, to grow food, has been around since man first 'mingled' with nature and required food to sustain himself, his family,...

8 Compelling Reasons to Choose SONIC On-Farm Production Services

Farmers stand to gain numerous benefits from utilising SONIC On-Farm Production Services to acess fresh Fish Hydrolysate and Liquid Seaweed...

How to Increase Soil Fertility through Mixed-Species Planting

Multi-species planting and pasture cropping can provide a number of benefits to the soil, including improved soil structure, weed control, increased...

Maximize Livestock Nutrition with the Ultimate Nutrient-Dense Diet

The digestive system of ruminant animals is specially adapted to extract maximum nutrition from plants they have eaten.  The digestive system...

7 Reasons why Farmers are Shifting to Organic Nitrogen Fertilisers

As the world becomes increasingly aware of the importance of sustainability, many farmers are moving away from using chemical nitrogen and toward...

Why Your Soil Needs Biology More Than Minerals

Does adding minerals to the soil provide the same benefits to plants as building the soil's biology? Beneficial microorganisms in the soil have more...

The Vital Role of the Ocean in Agriculture: 3 Key Contributions

The ocean provides an abundant natural resource of rich minerals, and contains much more than sodium salt; about 84 elements have been detected in...

Enhance Rumen Microbiota in Calves with Probiotic Support

In the world of animal agriculture, the health and well-being of livestock is of utmost importance. When it comes to calves, ensuring their optimal...

Top 2 Most Cost Effective Pasture Cropping Tips

When it comes to pasture cropping, the general rule of thought is, if you have healthy soil, you you have healthy plants.  This is true, however the...

Livestock Digestive Function: The Key to Improving Feed Efficiency

Livestock digestive health plays a crucial role in optimising net profit per acre. One key aspect of livestock digestive health is feed efficiency....

Top 3 Biological Fertiliser Strategies for Dry Times

During dry times, it is critical for farmers to maximise their return on investment (ROI) when it comes to fertilisation. One effective approach,...