Neem Oil Fungicide

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Last Updated on October 30, 2022

If you are struggling to mitigate fungal disease in your garden, one sure solution is neem oil fungicide. Apart from the pesticide job that neem oil does, it can also work as a fungicide and miticide. Therefore, neem oil works three in one!  Amazing, right?

Fungi Disease

It can be pretty disturbing when fungi invade your plants. The majority of plant diseases are caused by fungi. You must act fast when you spot any fungi activities in your garden before they spread uncontrollably.

Signs of Fungal Infestation

The first step to battling this fungal disease is to identify the presence of a fungal infestation. Fungal infestation can affect any plant. Here are the signs to look at for when it comes to fungal infestation.

  • White Mold: white mold, a fungi infestation, caused by sclerotinia begins to form on your plant leaves and also cause stem rot. It can eventually lead to plant death.
  • Powdery Mildew: fungal infestation will cause powdery mildew on your plant leaves.
  • Stem Rust: the stem of your plant begins to rust with a fungal infestation.
  • Leaf Yellowing and Rust: the leaves start to rust, especially corn leaves. Also, you may notice your plant leaves start to turn yellow. Sometimes your plant leaves may have some brown spot.
  • Seedling: your plant seedlings start to dampen.
  • Berries: you may notice some bird-eye spot on your berries.

Neem oil as Fungicides Treatments

When you have confirmed fungal infestation in your garden, you can now opt for neem oil as a treatment. Neem oil is an organic fungicide treatment safe for treating fungal infestation as well as protection against subsequent infection.

Neem oil treatment is non-toxic and can be applied to a fruit tree, leaves, stem, and soil.

Fungi Disease

Apply neem oil every 7 to 14 days as a preventive measure against fungi disease. To effectively treat fungal disease already present, spray neem oil on the affected plant on a 7-day schedule. Do this until the fungal disease is eliminated.

Spray neem oil fungicides in the evening time or early morning only. Avoid spraying neem oil during the hot periods to prevent the burning of leaves.

Recommended Neem Oil Fungicide

We recommend these neem oil fungicides for your plant:

  1. Garden Safe HG-83179 Neem Oil Extract Concentrate

Garden safe, a component of neem oil, is three in one product (fungicide, insecticide, and pesticide). It is a safe measure of treating and controlling different fungal diseases such as powdery mildew, white mold, leaf, and stem rust, bird-eye spot, tip blight, and so on.

Simply mix concentrated garden safe neem oil with water and spray your plants. Make sure you read the label and follow instructions for accurate results.

Garden safe neem oil is safe for application on your flowers, roses, houseplants, and, ornamental trees. You can also apply it to your vegetables, fruits, and shrubs. Assist your plants and help them grow safely and healthy all through their growing season with garden safe.

It can also be used as a dormant spray, protecting your plants all through the season.

  1. Monterey Neem Oil Insecticide, Miticide and Fungicide Ready to Use Spray – 32 Ounce

Another 3 in 1 neem oil is the Monterey neem oil. No need for mixing. It is ready to use, all you need to do is simply spray Monterey on your plant.

Monterey is formulated to prevent and control all kinds of fungi disease as well as insects and mites.

It works well on houseplants, flowers, roses, vegetables, fruits, shrubs, and trees.

  1. Neem Organics Pure Neem Oil

Neem organic pure neem oil offers effective fungicide control on houseplants, flowers, trees, and shrubs.

Apply 3ml to 7ml neem organic pure oil per quart of water inside a spray bottle and spray your plant. Spray neem oil organic early morning or late in the evening to avoid burning of leaves. Ensure you always read instructions on the label for accurate results.

Neem oil organics can also serve as a dormant spray by protecting your plants all through the seasons.


Is neem oil safe to use as a fungicide?

Yes, it is safe. But I'd recommend testing your neem oil before you go spraying it on plants. I have noticed that neem oil is a good fungicide for the lawn. I have used it on my lawn and it seems to work well.

How do you get neem oil for plants?

You can purchase neem oil in a bottle or can, but you can also make your own by mixing it with water. The best way to use neem oil is to spray it directly onto your plants. You can also mix it into your soil, water, or dilute it in water and spray it on your plants. If you're using neem oil on plants, be sure to read the instructions that come with the product, as some products can be harmful to certain plants.

You can buy neem oil in any health food store.

Is neem oil good as a fungicide?

I've had great success with neem oil. It doesn't kill everything, but it certainly kills the fungi and I've found that it's very effective in controlling them. You can also use it to repel pests such as aphids and other insects. I've had good luck with using it directly on plants, but I'd recommend spraying it onto the soil or diluting it in water before applying it to your plants. Neem oil is available at nurseries and garden centers, and you can make it yourself. There are several ways to do this, but I'll describe two of the most common. The first method involves making a tea from the neem leaves. Just wash the leaves thoroughly, then add enough boiling water to cover them completely. Let them steep for a few hours. The second method is to purchase the oil in a liquid form.

The neem oil seems to work on the surface of the leaf and stems and not the root system of the plant. When I spray the neem oil I only get a thin layer on the top of the leaves and stems.

What plants can you not use neem oil on?

Neem oil can be applied to a wide variety of plants. The only caution is that some plants, such as citrus and avocado, are known to be sensitive to neem oil, and can result in injury to the plant. If you apply it correctly, you shouldn't have any problems.


Let’s take a look at some of what we discussed above:

  • Neem oil fungicide is a safe organic treatment for various fungal diseases in plants.
  • Applying neem oil on all food plants is safe.
  • Neem oil works amazingly as an all-purpose insecticide repellant, mite repellent, as well as fungicide treatment.
  • You can also make use of neem oil as a dormant spray which will protect your plant all through the seasons.
  • Apply neem oil 7 to 14 days as a preventive fungicide, for control measure; apply on a 7 days schedule.

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