In the current trend of organic agriculture, fish protein (also known as fish fertilizer, fish meal) is increasingly favored due to its outstanding benefits for both soil and crops. Fish protein is an organic fertilizer produced from fresh fish and fish by-products (fish heads, intestines, bones, fins,…) through the process of biological fermentation.
Youtube Video: Fish Protein – The “MAGIC ELIXIR” FOR HEALTHY CROPS, GOOD SOIL, HIGH YIELD

What is fish protein? Nutritional components of fish protein
Fresh fish materials are used to ferment fish protein fertilizer. By-products such as heads, bones, and fish organs are utilized to produce nutrient-rich organic fertilizer.
Fish protein is often processed into liquid form (also known as fish protein liquid) or powder form. The hydrolysis process helps retain almost all of the natural nutrients found in fish such as protein (nitrogen), amino acids, vitamins, and minerals. Typically, fish protein has an N:P:K ratio of about 4:1:1 – meaning it is rich in protein, while the phosphorus and potassium content is lower. Fish protein contains a high organic protein content mainly in the form of amino acids (with up to 17 types of essential amino acids for plants), along with important vitamins (A, D, B group) and many macro and microelements such as calcium, iron, magnesium, manganese…. Thanks to this rich nutritional composition, fish protein fertilizer provides almost all the necessary substances for plant growth.
Benefits of fish protein for soil
Long-term use of fish protein brings many benefits to the soil, helping to improve the health and fertility of the soil thanks to its high organic content and beneficial microorganisms. Specifically, fish protein helps:
- Improve soil structure: Loosens the soil, increases humus, and improves structure in dry or depleted soil layers. The soil becomes more porous and aerated, allowing plant roots to develop easily.
- Increase water and nutrient retention: Fish fertilizer adds organic matter, helping the soil retain moisture better and limit nutrient leaching. As a result, crops have a stable environment to absorb necessary substances.
- Prevent soil degradation: Regularly adding fish protein helps reduce degradation, soil compaction due to the overuse of chemical fertilizers. Conversely, the soil gradually becomes “alive” thanks to the rich microbial system being nourished. After a period of using fish protein, the number of earthworms in the soil increases significantly, contributing to soil aeration and improving the soil ecosystem. At the same time, microorganisms and organic acids from fish fertilizer also help transform hard-to-digest nutrients in the soil (such as fixed minerals) into forms that plants can absorb, increasing soil fertility.
- Reduce toxins and pollution in the soil: Fish fertilizer also has the ability to detoxify the soil, reducing the levels of harmful substances such as excess nitrates, alum, or accumulated salts from irrigation. As a result, the soil environment becomes safer for root development.

Notably, fish protein does not cause soil compaction like when applying too much chemical fertilizer. On the contrary, the soil will become increasingly loose and fertile while maintaining beneficial microorganisms. Using fish protein fertilizer also does not leave any toxic chemical residues in the soil and harvested crops. This is an advantage that helps organic agriculture improve soil while protecting the environment in the long term.
Benefits of fish protein for crops
Fish protein is likened to “the magic elixir” for crops due to its numerous effects in promoting growth and increasing resistance for plants. Notable benefits include:
- Stimulate root, shoot, and leaf development: By providing a lot of easily absorbable amino acid protein, fish fertilizer helps plants develop strong new roots, rapidly growing shoots, and denser green foliage. Crops grow healthily and robustly in both stems and roots.
- Promote flowering and fruit setting: Amino acids such as proline and tyrosine in fish protein have been shown to stimulate the pollination process and extend the lifespan of pollen grains, thereby increasing the rate of flower and fruit setting. As a result, when applying fish protein during the flowering and fruiting stage, plants produce more flowers, with a higher fruit setting rate, reducing the occurrence of fruit drop. At the same time, fish protein also helps fruits develop quickly, evenly, with beautiful skin and better quality flavor.
- Increase resistance, reduce pests and diseases: The components of fish protein contain amino acids with sulfur elements (such as cysteine, methionine), which help plants enhance their resistance to fungal diseases and pests. Regular application of fish protein helps plants stay healthy and better withstand harsh weather (drought, cold, flooding) as well as reduce the impact of pests and biological stress. Additionally, fish fertilizer also supports plants in detoxifying some residues of herbicides and chemical pesticides, helping to recover plants after poisoning.
- Quickly absorbed, safe nutrients: The fish protein liquid after fermentation is in small molecular form (amino acids) so that crops absorb very quickly through roots or leaves. When watering or spraying fish fertilizer, plants can utilize nutrients almost immediately, without waiting for microorganisms to further decompose in the soil. Thanks to this property, fish protein fertilizer does not cause shock or root burn like high doses of chemical fertilizers, while also limiting nutrient loss due to evaporation or leaching. Growers can spray on leaves for quick supplementation when needed without worrying about leaf burn. The harvested crops from plants fertilized with fish protein are also cleaner, as there are no residues of harmful chemicals, ensuring safety for consumers.

In summary, fish protein fertilizer provides diverse and balanced nutrients for crops, helping them grow lush and green, increase yield, while naturally minimizing the risk of pests and diseases. This is a friendly nutritional solution to enhance crop quality without relying heavily on chemical fertilizers.
How to use fish protein effectively?
To maximize the benefits of fish protein, growers need to apply the correct usage methods and appropriate dosages for each growth stage of the plant. Fish protein can be used as a base fertilizer or diluted for foliar spraying. Here are some general notes when using fish protein:
- Timing of use: It is best to apply fish fertilizer in the early morning or late afternoon. Avoid spraying or watering during intense sunlight to ensure the best absorption and prevent thermal shock. In particular, do not spray on blooming flowers to avoid flower drop.
- Frequency of application: Fish fertilizer is usually applied periodically about every 7–15 days depending on the type of plant and growth stage. Regular supplementation helps maintain a stable nutrient source for the plants.
- Mixing method: Always dilute fish protein liquid with water according to the manufacturer’s recommended ratio before watering/spraying. Mix well to ensure the fertilizer solution disperses and penetrates better into the soil or leaves. Avoid applying concentrated doses beyond the recommended amount to prevent waste and ensure safety for crops.
- Storage and odor: Seal and store fish fertilizer in a cool, shaded place. Well-fermented fish fertilizer usually has a light characteristic smell like fish sauce or soy sauce, which is not too unpleasant. However, it is still advisable to avoid storing it near residential areas or sources of drinking water.
Organic Fish Protein 500ml – The new generation fish protein solution from ViDan
To help farmers use fish protein more conveniently and effectively, ViDan has researched and developed the product Organic Fish Protein (500ml) – a new generation organic fertilizer combining hydrolyzed fish protein with advanced MicroCarbon technology. This product is a completely hydrolyzed fish protein solution, supplemented with MicroCarbon compounds to enhance nutrient absorption capacity for crops. Thanks to MicroCarbon technology, the nutrient ions in the fertilizer are utilized more thoroughly by the plants, reducing loss and improving fertilization efficiency.
Organic Fish Protein 500ml provides a balanced organic nutrient source for many types of crops, while also supporting soil improvement and increasing the natural resistance of plants. The product is particularly suitable for cultivating fruit trees, vegetables, and industrial crops… with the aim of promoting leaf shoots, nurturing fruits, and recovering crops. Below are the recommended dosage instructions for using Organic Fish Protein by ViDan, depending on the growth stage of the plant:
- Basic establishment stage (seedlings, branch and leaf development): Mix 500 ml of Organic Fish Protein with 400 liters of water, watering or spraying periodically every 10–15 days. This stage focuses on helping the plant develop strong roots, vigorous shoots, and lush foliage.
- Fruit nurturing stage (flowering, fruit setting, and nurturing fruits): Mix 500 ml with 200 liters of water, apply periodically every 7–10 days. A higher dose at this stage provides sufficient nutrients to grow large fruits quickly, reduce fruit drop, and help fruits become plump and beautifully colored.
- Recovery stage after harvest: Mix 500 ml with 200 liters of water, apply every 10–15 days for several consecutive cycles after harvest. The aim is to help the plant recover quickly, regenerate roots and branches, preparing for the next crop season.

Note: When using Organic Fish Protein 500ml, farmers should shake the bottle well before mixing, and strictly follow the recommended dosage. Combining base fertilization and foliar spraying alternately will yield comprehensive results (healthy roots, healthy leaves). Avoid mixing fish fertilizer with chemical fertilizers or other pesticides unless advised, to ensure the microbial activity in fish fertilizer is not affected.
Conclusion
Fish protein is an excellent organic fertilizer choice for a green, clean, and sustainable agricultural foundation. Thanks to its diverse and safe natural nutrients, fish protein fertilizer not only helps crops grow healthily, enhances yield and quality of agricultural products, but also improves the soil to become increasingly fertile and vibrant. The use of fish protein products such as Organic Fish Protein 500ml from ViDan provides a balanced, environmentally friendly nutritional solution, reducing dependence on agricultural chemicals.

