How to make HOMEMADE ORGANIC FERTILIZER for plants - 10 Options

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We know that compost with organic matter has the ability to add more nutrients to the soil, increasing its fertility and viability. A cheap way to make compost is by using the organic waste that we generate daily in our home. In this way, we will achieve a triple benefit, reducing the use of synthetic fertilizers on the ground, less spending on fertilizers and making use of household waste (less amount of garbage generated).

In this Green Ecologist article, we reveal the answer to how to make homemade organic compost for plants, giving you various ideas and examples.

Why use organic fertilizers instead of synthetic ones

There are many advantages of using compost and organic fertilizers and more if they are made at home, because the natural is always healthier and, in addition, we will be reusing waste. It should also be borne in mind that the disadvantages of synthetic fertilizers, and these are some of them:

  • They contribute to climate change.
  • They can cause contamination in waters, soils and rivers, as a consequence of the washing effect of the rains.
  • They affect plants and nutrients due to excess minerals: synthetic fertilizers are generally very concentrated and when used in excess they can worsen the quality of the soil, instead of improving it.
  • They contribute to the acidification of soils, favoring desertification.
  • They can cause poisoning when handled without adequate protection.

Learn more about these products in this other Green Ecologist article on Organic Compost: what it is, benefits and how to do it.

Fertilizers and organic fertilizers for plants - the most recommended

These are some of the Homemade organic fertilizers for most recommended plants for its benefits for the land and crops and, also, for its ease of obtaining and application:


It is undoubtedly one of the best and most beneficial organic fertilizers for the soil. Although it can be purchased at garden stores, if you have chickens, goats, or rabbits, you can use their droppings. Rabbit droppings have the highest nitrogen content and can be added directly to the soil, but those of other animals must go through a previous composting process.

Banana skins

Bananas have a high potassium content, which is very beneficial as a nutrient for our plants, for example, it is very beneficial for flowering. After eating the fruit, we can use its peel to make homemade compost.


Eggshells are very beneficial in the garden, as they provide nutrients such as calcium carbonate and serve as a pest repellent. The ideal is to crush the peels well to add them to our homemade compost, although you can also make a powder with them and spread it well at the base of our plants.

Coffee grounds

After having a cup of coffee, we can take advantage of the coffee grounds or leftovers to make compost for our plants, since they provide a good amount of nitrogen, which is very beneficial as a nutrient. They can also be mixed directly into the ground or spread on its surface. Here we will tell you more about the Ways to use coffee grounds in the garden.

Human urine

Urea in urine has a very high content of nitrogen, phosphorus and potassium. Urine is a sterile product as long as the body that produces it is healthy. It can be dissolved in water at a 1: 8 ratio and added to our homemade compost. We recommend this other post about Urine as an ecological fertilizer for agriculture and gardening.


Once the grass or weeds have been cut, they can be added to our organic compost, since they are very rich in nitrogen and retain some of the nutrients that they have absorbed from the same soil on which they have grown.

Fireplace ash

The ashes from the fireplace provide large amounts of potassium and calcium carbonate, ideal for making our homemade compost. It is important not to apply them directly around acidophilic plants or if the soil is alkaline.


The acetic acid in vinegar is very good for plants that require acidic soils. You can even dissolve the vinegar in water and water plants of this type directly.

Earthworm humus

The earthworm humus is one of the best organic fertilizers, totally natural and effective to improve the health of the plants, so that they grow healthy and flourish or bear fruit. The truth is that humus as such and with its most suitable composition is only achieved on forest soils, produced naturally by earthworms. However, you can get a very similar product at home, making or buying a vermicomposter. Here we explain how to make worm castings for plants.


Lentil sprouts are excellent as a compost and rooting agent. If you want your new plants to take out more roots and grip better to grow without problems, do not hesitate to make these sprouts, crush them in water, strain to obtain the liquid and remove the remains of the lentils and, finally, mix a part of the concentrate with ten parts of water to use this product as irrigation water for fertilizing and rooting. In this other post we will talk about How to make lentil sprouts.

How to make homemade organic compost for plants step by step

Although you can take some organic waste directly to the ground, the ideal for these to decompose is to follow a series of steps to make a homemade compost or compost. These steps to make an organic compost at home for your plants are:

  1. Drill a few holes in the surface of a small container approximately one meter deep (or in a large or medium container, depending on our needs).
  2. Place 4 or 5 fingers of soil inside (or more depending on the container).
  3. Add organic waste (examples mentioned above). It is important that they are not waste from any animal product.
  4. Cover with a little more soil.
  5. Every so often (approximately two weeks), stir well with a shovel, bringing the remains that are down to the surface and vice versa. This step is important to aerate our homemade compost.

After a few weeks, worms, fruit flies and other insects start to appear in our compost; a sign that the decomposition process is taking place. When the soil takes on a black, lumpy appearance and the organic matter has completely decomposed, it is ready to be applied in the garden or orchard. The smell of compost should be similar to that of wet soil. The compost manufacturing process usually takes two months, if we start in summer (the heat favors decomposition) and five months, if we start in winter. To apply, spread it by spreading it well around the roots of the plants, using a rake or other instrument.

Finally, we recommend you take a look at these other posts about Bokashi or bocashi compost: what it is and how to do it and about Compost for orchids: how to do it. Likewise, we encourage you to watch the video that we leave you here below about this process to make your own compost.

If you want to read more articles similar to How to make homemade organic compost for plants, we recommend that you enter our Garden Care category.

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