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Some of the products that we use in our day to day for domestic use can serve as fungicides and help us eliminate unwelcome microbiological attacks such as fungi. To make it easier for you, in this Green Ecologist article, we show you what are the best homemade fungicides and ecological that you can easily prepare at home to treat your plants, both indoors and outdoors.

These natural fungicides will be useful against fungal infections in your garden or garden such as rust, powdery mildew, canker, leprosy, mildew and botrytis. Use them as directed and the brown and white spots on your plants will disappear, looking healthy again.

The best homemade fungicides

To start, from Ecologist Verde we will tell you some of the best homemade fungicides, totally natural and ecological:

  • Rue: It is a medicinal plant whose extract has an antifungal function. It controls anthracnose, a disease that occurs in the form of dark lesions on both the stem and the leaves.
  • Papaya: It stands out for its fungicidal effects, which is why it is often used a lot in vegetables. It is very effective in controlling mildew and rust.
  • Peroxide: It is not only used to clean bleeding wounds, it is also useful against fungi, especially mildew. For this, 150 cc must be mixed with 40 liters of water and distributed throughout the plant.
  • Onion: If used whole it has an incredible effect on oidium, especially on young plants. It is applied both when the seed sprouts and when it is in the growth phase. The mixture is usually 500 grams of onion for every 10 liters of water.
  • Thyme: in the same way as papaya, its active principle is capable of acting as a very effective fungicide.
  • Garlic: the homemade fungicide with garlic is used in the form of an infusion. 75 grams of garlic are mixed with 10 liters of water and it is applied very early in the morning or at the end of the sunset. Its action degrades with the sun and high temperatures.
  • Horse tail: however, the most prized plant of all is horsetail. It contains a high index of silica and that makes it a great fungicide against fungi such as powdery mildew, mildew or rust. It is usually used as a curative or preventive way. One kilo of horsetail is mixed with 10 liters of water.

Next, we show you more options of homemade organic fungicides according to the type of plant or trees to be treated.

How to make a fungicide with milk and baking soda

These are two super effective natural ingredients against fungal pests in the garden and orchard. Bicarbonate has highly antiseptic and healing properties, to heal the lesions of the plant in which the plague is, and milk is a powerful fungicide, thanks to lactic acid. If you have these two ingredients, go ahead and try this recipe for homemade and natural fungicide with milk and bicarbonate for plants. Very easy!

Ingredients for 1 liter of homemade fungicide

  • 200 ml of cow's milk, preferably skimmed because the important thing is the lactic acid and not the fat in the cream.
  • 800 ml of water (soak tap water for two days or use rainwater or bottled water.
  • 20 g of baking soda for each liter of fungicide that you are going to make.


  1. To start preparing this ecological fungicide, you will need to find a container of the appropriate size, in this case we will make a liter and we recommend a slightly larger container to mix well. Preferably, look for a spray bottle.
  2. Pour in the water first, then the milk, and finally the bicarbonate in the proportions indicated.
  3. Close the jar or container and shake it well so that the ingredients are integrated.
  4. It should be applied two days in a row and not just once. It is always better to do it at sunset, to avoid the sun burning the leaves when they are wet.
  5. It is also recommended to repeat the application once a week to eliminate the fungi completely, applying the mixture both above and below the leaves, covering the entire plant. On the other hand, to prevent a relapse once the plant has healed, it is convenient to apply the mixture every two weeks, until we make sure that there are no more fungi or in the soil.

Learn more about this homemade fungicide for plants in this other article on How to make homemade fungicide with baking soda.

The best homemade fungicides for tomatoes

Tomatoes are very common in orchards, and now also in urban gardens and even in pots thanks to the cherry variety. However, they are also one of the plants that is more likely to suffer from fungi, such as powdery mildew, due to the densest area of leaves that is close to the ground.

If you have tomato plants or tomato plants with mushrooms, worry no more. Take note of what are the best homemade and organic fungicides for tomatoes:

  • Baking soda
  • Cornstarch
  • Vinegar
  • Essential oils
  • Compost tea

So that you know well how to use each one and have more information about fungi in tomato plants, we recommend this other article by Green Ecologist about Homemade fungicides for tomatoes.

Homemade fungicides for fruit trees

Other of the most sought after home fungicides, especially by those who have large orchards and gardens, are the most effective for fruit trees. If this is your case, we recommend you try these natural products to combat fungi in fruit trees, very effective both in citrus, which are the most common, and in other types of fruits:

  • Apple vinager
  • Baking soda
  • Cinnamon
  • The technique of the absence of water, which is an ecological way of eliminating fungi in the trees but we must take care that it does not affect their growth.

Thus, if you are looking for a homemade fungicide for lemon trees and you want to know how to use it correctly, we recommend you read this other article in which we explain in detail the homemade fungicides for fruit trees.

Homemade fungicides for orchids

Orchids can be difficult plants to care for, as they are delicate. For this reason, it is easy that if there are errors in its watering and we allow enough water or humidity to be retained in its roots, fungi appear in this part of the plant and little by little they spread to the rest of the orchid. If you have this problem, take note of The Best Homemade Fungicides for Orchid Fungi:

  • Cornmeal Tea
  • Cinnamon
  • Baking soda
  • Garlic
  • Vinegar

Learn more about them and their correct application in this article about homemade fungicides for orchids.

How to make homemade fungicides for cacti

Cacti are one of the easiest plants to care for because they hardly need care, among which are a good location, with adequate light, temperature and ventilation, a good and light substrate and some water from time to time. However, sometimes they can get sick, especially when they do not receive enough light and if we over water it. This is when fungi can appear and, in this case, we recommend using a ecological fungicide.

Among the most effective and efficient ingredients to make homemade fungicides for cacti we highlight:

  • Cinnamon powder
  • Chamomile tea
  • Milk or buttermilk
  • Sodium bicarbonate
  • Horsetail tea
  • Garlic

If you want to learn more about these natural products to end these types of pests in cactus plants, read this other article in which we give you the best homemade fungicides for cacti.

If you want to read more articles similar to Homemade fungicides, we recommend that you enter our category of Cultivation and care of plants.

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