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9 Best Organic Fertilizers for Feeding Your Plants & Garden

Discover the 9 best organic fertilizers to enrich your plants and garden, ensuring healthy growth with natural solutions.

Table of Contents

Soil health is the most important factor for the high yield & growth of the plants. For plants and gardens, organic fertilizers are highly preferable. However, organic fertilizers are low in nutrients but they provide long-term benefits to the plants. These are less damaging to plants and promote growth in a healthy way. You need to choose organic fertilizer according to the soil and plant requirements. 

In this article, I am going to share the 9 best organic fertilizers that can be the best option for your plants and gardens with their complete information and importance. Moreover, It includes the ways to choose the right fertilizer and why you should use it. 

How to find the right organic fertilizer for your garden?

the right organic fertilizer

For garden plants, there are many fertilizers that are available. However, you have to use the right fertilizer among these, depending on your garden plants. Before applying any fertilizer, it’s better to test your garden’s soil. The following tests are important for this purpose and are helpful in determining the right type of fertilizer:

Check soil texture

You have to observe the soil texture of your garden. The soil can be Clay, loamy, sandy, or silty. According to the types of soil, fertilizers are used. 

Nutrients concentration

It’s better to check for soil nutrients. This is helpful to know about the deficient nutrients. Mainly, there are NPK (Nitrogen, phosphorus, potassium) whose concentration you need to check in the garden soil. 

Soil PH

The soil PH plays an important role in the plant growth. High PH can also disturb the nutrient uptake of the plants. Overall, the 6.5 to 7 PH is considered as best for the growth of plants. 

9 best organic fertilizers for plants and gardens

However, most people use synthetic fertilizers but with time the excessive amount of the fertilizers are causing pollution. For this turn, most of the farmers are switching to organic fertilizers. This will add important nutrients to the garden that acts as a super food for the garden. 

1. Compost as an organic fertilizer

In this way, the nutrients are returned back to the soil on a minimum budget. Gardens are the places where everyone wants cleanliness and peace. Using synthetic fertilizers the environment can be made polluted. However, if you use compost it will be the best and environment-friendly option. For healthy plants, they play an important role in their nutrient management. They are composed of nitrogen, potassium, and phosphorus. It performs the following functions for the plants:

  • The addition of compost will replenish most of the key nutrients.
  • It’s the best addition for the soil to retain the moisture. 
  • With the passage of time, it improves the soil quality and texture.
  • Additionally, the compost can also be prepared easily using a few methods. If you are growing plants, you must supply these contents to the plants that are filled with the nutrients. 

2. Bone meal 

There are many important nutrients that are present within the bones. In the bone meal, the animal bones are used in a powdered form to work, like fertilizer for the plants. These are slow-releasing types of fertilizer that provide nutrients to plants with time. These are performing the following functions in the garden and plant soil that are:

They are excellent sources of phosphorus. That is essential for the blooming of bulbs and overall plants. However, it has low quantities of Nitrogen in it. Many commercial bone meal fertilizers are also available in the market with added Nitrogen. So, you can choose the NPK ratio for these as well.

  1. Additionally, these are slow-releasing nutrients. The better idea for its application is to dig the soil around the plants and place them inside. 

3. Blood meal: A natural excellent fertilizer

In the blood meal mainly the nitrogen is present in high quantities. That’s why for nitrogen-depleted soil, it can be a good idea to use the blood meal. If you have grown plants in your garden that require more nitrogen then blood meal is the best supplement for these. If you use it before the growing period of plants, it will slowly start to release its nutrients to the soil. Moreover, with its scent, it also keeps some of the pests away from the plants. For application, you just need to sprinkle it over the plants.

4. Worm castings as fertilizer

Worm castings

You can also grow and use the worm castings using vermicomposting. You can grow these using kitchen waste and other stuff. The resulting products will give out the worms and worm castings. They will have many benefits for the plant and plant soil. That is:

  • These are slow-releasing and will not burn the plants in any case. 
  • Overall, they improve the soil structure and texture with time.
  • These are good additions to the soil, where they prevent spider and aphid attacks. 
  • They are helpful in providing the soil with moisture. 
  • They aerate the soil just like regular compost. 

5. Banana peels as a fertilizer

The banana peels are a good source of potassium. Besides this, they are also a good source of Sulphur, magnesium, calcium, and manganese. They are controlling the vital plant systems. This can be used in the form of liquid or sprays for your garden plants. This is an inexpensive method for utilizing the fertilizers. After eating bananas, you just simply use the peels as fertilizer. With its slow-releasing effects, they will provide nutrients from time to time in the soil. These make the soil composition good. In garden plants, they will decompose instantly with some time and provide protection against pollution.

6. Manure

Manure is a great fertilizer addition for plants. However, don’t use fresh manure, this will burn the garden plants. That’s why, the old aged manure should be used for its purpose. The manure can be used from different animal sources. That can be from horse, chicken, goat, cow, sheep, and rabbit manure. Manure is rich in nitrogen concentration. In cow manure, there is little content of the Nitrogen in it. The dry form of the manure has a low bad smell. Rabbit manure does not have any burning effect on the plants which is why these are also called cold manure. These must be applied in small quantities.

7. Seaweed fertilizer

Mostly seaweed fertilizers are used for marine plants. However, this is also useful for garden plants, especially for the growth of vegetables. These are used in the form of sprays and mulch. Nutritionally, they possess low amounts of the nutrients in it. They Improve the garden soil and provide growth supplements to the plants.

8. Guano 

The Guano is known as the animal excrement. This is helpful for amending the soil. You can find these within your gardens and you can also purchase them online. Make sure that you are purchasing the organic guano. Their feeding to plants improves them. It also promotes the growth of the plants. 

9. Fish emulsion

This acts as a booster for the garden plants. These are the perfect sources of nitrogen for the soil. These are the liquid fertilizers that are full of nutrition. Mostly, this liquid content is diluted with water and then used in the form of sprays for the vegetables. 

Other important organic fertilizers for the healthy growth of garden plants

Other important organic fertilizers

Mycorrhizae (Microscopic fungi)

However, these are not the exact fertilizers. These are the fungi that play an important role in plants’ life after attaching. They make associations with the plant roots and provide all of the essential nutrients to the plants. It increases the nutrient uptake quality of the plants. They provide resistance against droughts. Mycorrhizae itself starts to break down the nutrients in the soil. Due to these reasons, plants can easily use these from the soil. It’s better to use the no-dig garden policy. The garden already has the mycorrhizal associations. However, through digging the soil the association breakdown takes years to recover. 

Tomato paste

Tomatoes are a good source of potassium. In a nutrient-deficient soil of potassium, it can be a good option to use. The tomato paste can be directly used to provide the right content of potassium to plants. 

Eggshells water

The water that is used for boiling eggs can be beneficial for the plant’s growth. 

Rice water

This water is good for the soil that contains small amounts of NPK and starch. Phosphorus is good for the division and cell growth of the plants. Moreover, it is helpful for the green leaves and good for the soil. 

Why should you use organic fertilizer for plants and gardens?

These are less expensive. The nutrient level of the soil improves with time. The best thing is that they are less toxic and more beneficial for the soil. They improve the soil texture and nutrient level with time. They are slow releasing and leave a positive impact on the plant and soil. Soil health is the main element necessary for plant growth. The organic fertilizers are environment-friendly and provide the right nutrition and moisture to the plants.

Case Studies: Successful Implementation of Organic Fertilizers

Urban Community Garden in Toronto, Canada

In the heart of Toronto, a community garden utilized compost and worm castings to revitalize urban soil. The outcome was a 40% increase in yield for vegetables like tomatoes and leafy greens, demonstrating effective urban organic gardening practices.

Large-Scale Organic Farm in California, USA

A Californian farm transitioned to using fish emulsion and seaweed extracts across 500 acres of orchards. The switch not only improved soil fertility but also enhanced the taste and shelf-life of fruits, proving the scalability of organic fertilizers in commercial agriculture.

Subsistence Farming in Rajasthan, India

In the arid regions of Rajasthan, smallholder farmers used locally sourced goat manure and bone meal to fertilize their millet crops. This practice led to a sustainable increase in grain production by 30%, showing the effectiveness of simple organic solutions in challenging environments.

These case studies illustrate the versatility and benefits of organic fertilizers across different scales and conditions, providing valuable insights and practical knowledge for adopting sustainable agricultural practices globally.


Using organic fertilizers for the plants and garden is the best option for healthy and long-lasting plant life. These are helpful for plant growth and nourishment. However, you must select the fertilizer according to the soil type of your garden. Manure, compost, blood, bone meal, and other fertilizers are the most useful organic fertilizers. 

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