Gardening Tips

How to make homemade organic fertilizers

How to make homemade organic fertilizers

The plants that we grow in our gardens and orchards require, mainly, 3 types of basic nutrients. Although we can find other elements, such as calcium or magnesium, which are largely involved in the proper functioning of the plant, nitrogen, potassium and phosphorous They are of vital importance for the growth of all plants.

In this EcologíaVerde article we teach you how to make homemade organic fertilizereasy and cheap based on each of the essential nutrients.

Organic homemade fertilizer with phosphorus: wood ashes

Wood is a very abundant material and we can use the ashes resulting from burning in fireplaces to heat houses, for example, as a organic fertilizer very effective for provide phosphorus to our plants. Although to a lesser extent, the burned remains also have a small potassium content.

The simplest way to get ash is by taking advantage of the end result of barbecues or fireplaces. Then for use wood ashes as fertilizer, you just have to mix them with water, to dilute their content, and apply it to the plants as irrigation. It is important to do it only about 2 or 3 times a year so that it is not excessive.

Homemade Organic Fertilizer with Potassium: Banana Peels

As is well known in popular culture, the banana is a fruit with a high potassium content. And said element is also largely found in the peel of this fruit. In this section, we teach you how to make a organic fertilizer with a high potassium content made from banana peels.


  • 3 or 4 banana peels
  • 1 liter of water


  1. First of all, you have to have a few shells, which allow you to carry out a good extraction from an infusion. With 3 or 4 banana peels for each liter of water we will be enough.
  2. The total amount of fertilizer will depend on the number of plants each person has.
  3. Chop the shells and put them, together with the water, in a pot to boil for approximately 15 minutes.
  4. After this time, strain the mixture and let it cool.
  5. You already have your fertilizer, which mixed with 2 liters of water, will be ready to apply to your plants.
  6. Potassium is a very useful element in flowering or fruiting periods. You can apply it every 10 or 15 days and your plants will notice a great contribution, which will help the plants grow faster and produce their flowers and fruits.
How to make homemade organic fertilizers - Homemade organic fertilizer with potassium: banana peels

How to make organic fertilizer with nitrogen: coffee grounds

Coffee can be a potential ally against certain pests and diseases. But in addition, it has great potential as an organic fertilizer, since its content in nitrogen is very high, in addition to containing other nutrients to a lesser extent and antioxidants. In this section, we will learn a very quick, simple and cheap way to provide our plants with extra nitrogen. follow these steps to make homemade organelle fertilizers with nitrogen:

  1. Accumulate the remains of coffee from the coffee pots that you prepare. Whether they are the ones you have at home for daily use, or if your number of plants is very high, you can use the nearby bars and cafes.
  2. You can mix these remains with water and let them rest for a few days, or we can apply them directly to the ground.
  3. It must be remembered that coffee is a very acidic material, so its use as a fertilizer is only recommended for those plants that require an acidic substrate, such as hydrangeas, camellias and gardenias.

In this other EcologíaVerde article we show you ways to use coffee grounds in the garden.

How to prepare organic fertilizer with calcium: eggshells

To finish, we tell you a very fast, simple and cheap way to be able to provide your plants with extra calcium. It’s about the eggshells, since its content is 95% calcium, and to a lesser extent nitrogen. It’s about a homemade organic fertilizer very simple but effective, you just need to follow these instructions:

  1. Collect a large number of eggshells.
  2. Wash them if they still contain remains and grind them.
  3. They can also be applied directly to the soil, although then the absorption by the plants will be slower.

Calcium is not an essential nutrient, nor is it one of the most needed by the plant. But as mentioned above, some secondary elements can play a decisive role in some specific plant processes. And the contributions of calcium can help solve problems related to the cultivation of some vegetables. An example of this is the blossom-end rot of tomatoes, aubergines and peppers.

How to make homemade organic fertilizers - How to prepare organic fertilizer with calcium: eggshells

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