How to Make Fish Fertilizer at Home?

It’s possible to produce your fish emulsion fertilizer at home instead of purchasing it. What’s the point of spending a lot of money on something you can obtain for a fraction of the price? Follow our easy instructions, and you’ll save money and your garden at the same time.

How to make fish fertilizer at home? A better title would be “money-saving tips.” Let’s not get started on the expense of commercial fish fertilizers. Also, making your own fish emulsion is an excellent method to recycle fish waste or even your whole catch and turn it into potent plant fertilizer.

Many garden vegetables and other plants benefit from the use of fish emulsion as a fertilizer. Just be careful not to use it on your houseplants; other than that, you’re good to go.

What Is Fish Emulsion Fertilizer? 

Organic fertilizer derived from entire fish or leftovers of the fishing industry, such as fish scraps, fish oil, and fish meal, is referred to as “fish emulsion fertilizer.” Many also refer to it as “liquid fish fertilizer.”

The idea of fertilizing fish is not new. Native Americans demonstrated to the European settlers how to collect and deposit fish to make fish fertilizer.

Besides that, farmers worldwide utilize fish emulsion instead of hazardous chemical fertilizers in their organic farming practices. Typically, it is used as a foliar feed to enhance nitrogen levels quickly as the mixture exhibits an NPK ratio of 4:1:1. 

A Few Advantages of Fertilizing with Fish Emulsion

There are many advantages to employing fish emulsion when it comes to fertilizing your garden or lawn. Let’s have a look at a few of them here. 

Quick-Acting Fish Fertilizer

While compost functions as a slow-release method for plant nutrients, fish emulsion is a very fast-acting plant mixture that distributes nutrients rapidly.

Due to its quick-acting nature, the plants’ nutrient absorption process becomes quite breezy. This phenomenon implies that you need to feed the plants regularly to achieve their full potential.

Organic Fertilizer 

Fish emulsion is an ecologically beneficial alternative to synthetic chemical fertilizers. In fact, this organic debris provides food for bacteria and supports the development of microorganisms, both of which are beneficial to soil health.

Nutrient-Rich Fish Emulsion 

As mentioned earlier, this particular mixture features an NPK ratio of 4:1:1, indicating that it is rich in nitrogen and relatively low in potassium and phosphorus, respectively. 

Other trace minerals, or micronutrients, such as calcium and magnesium, may also be present in the fish mixture.

Fish Emulsion Fertilizer: a Quick and Easy Homemade Recipe

You may produce your own liquid fertilizer at home by following basic guidelines. Let’s have a look! 

  1. Begin by acquiring a few essential materials. A five-gallon container with a top that has perforations, sawdust, and molasses without any chemicals, water, and a filter to separate the insoluble components are all that is required. Honestly, it doesn’t need too many parts, to begin with. 
  2. Now all that is left to do is to mix the ingredients. Mainly, half-fill the container with equal measures of fish and sawdust. Afterward, pour a cup of molasses and adequate water to enclose the mixture completely.
  3. In your large bucket, stir the ingredients thoroughly until appropriately mixed. Moreover, you must seal the bucket with a cover with openings to allow for ventilation.
  4. Keep in mind to whisk the mixture on a frequent basis. Also, don’t forget to mix the fertilizer every day with a small shovel or stir-stick the following fourteen days. 
  5. Once you are done with the mentioned steps, filter the mixture and drain the liquid into a container. Using a strainer, remove any sediment from the fertilizer mixture and store the liquid in a separate vessel.
  6. The most crucial part is recycling any solid waste that remains. Once the filtration process of the fish emulsion solution is complete, you should repurpose the solid leftovers by pouring additional water and un-sulfured molasses into the container. Finally, you will get a new batch of fertilizers. 


You can use one batch for at least a year, but it’s best to prepare a new set every season if possible. If you only require half or a quarter of the recipe’s volume, you should cut the recipe’s ingredients in half. 

The stench will be prominent, so keep it in an area that won’t bother you. To be honest, I’m skeptical about “scented” fish emulsions since the mixture removes part of the fish product to eliminate the odor.

Final Words

As we all know, commodity fish emulsions have two significant drawbacks: cost and smell.

While we cannot assist you with the odor, we can guide you through how to make fish fertilizer at home, which is budget-friendly in terms of product purchase and shipping expenses.

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