How to make neem oil spray for plants, is a process that you can handle easily if you follow the right steps to carry out the task. Lucky for you, we’ve got the easiest and simplest guide that’s bursting with information and details.How to Make Neem Oil Spray for Plants

Continue reading our article, and you will be able to prepare the right needs and tackle the issue.

How to Make a Simple Neem Oil Spray for Your Garden Plants?

To make a simple neem oil spray for your garden plants, prepare the needed material, and measure the water. Then, you should add neem oil and liquid soap, mix it thoroughly, stir the mixture properly, test it and transfer it to the spray, and prepare to spray.

Gardeners adore neem oil for its potent pest and disease-fighting prowess while being environmentally friendly. You must also be detailed how you can concoct this fantastic spray for your exquisite plants to protect them from houseplant pests and diseases like powdery mildew.

1. Prepare the Neem Oil Spraying Materials

To create your neem spray, get neem oil concentrate, liquid soap, water, a container, measuring tools, stirring equipment, and a clean spray bottle. Obtain cold-pressed, 100 percent of pure neem oil from reputable sources specializing in organic gardening products.Neem Oil Spraying Materials

Ensure the label indicates that the oil is pure, without any additives. Look for it at garden centers, nurseries, or online stores. Choose a mild liquid soap like Castile or insecticidal soap designed for pest control.

On the other hand, you should also try to avoid dish soaps with degreases, bleach, or strong chemicals that can harm plants. Preferably, use distilled or filtered water to minimize impurities or chlorine.

If not available, let tap water sit for almost a full day so that it allows the chlorine to dissipate. Select a clean container suitable for mixing and storing the neem spray. Ensure it has a tight-fitting lid or cap to prevent leakage. Use a clean spray bottle with a fine mist setting for easy application, so try to look for glass or plastic spray bottles with adjustable nozzles.

2. Measure the Water

The neem spray concentration varies based on pest severity and plant sensitivity. Adjust the measurements to suit your needs. For milder infestations, we recommend making neem solutions even more diluted, but be keen that because of severe cases, use a stronger mix.

Choose a container that accommodates the required water volume for your dilution. Opt for a small bucket, watering can, or spray bottle, depending on plant size and coverage area. Accurately measure the water using a suitable tool like a measuring jug.

Use distilled or filtered water to preserve neem oil effectiveness by avoiding tap water impurities or chemicals. Add the measured water gradually to the chosen container. Pour water first before introducing neem oil to minimize excessive foaming during mixing.

3. Add the Neem Oil

To dilute neem oil, start by measuring the appropriate amount of water based on your desired concentration. Adjust the measurements according to your container size and preferred attention for a common dilution ratio of two tablespoons of neem oil per each gallon of water.Adding Neem Oil

Once you have the correct amount of water in your container, gradually add the neem oil while stirring the mixture. Neem oil is thick and can be viscous, so take your time to prevent separation from the water. For this, you can add a small portion of neem oil, roughly a quarter of the total amount.

For instance, if you’re using two tablespoons of neem oil, add approximately half a tablespoon to the water. However, you should be mindful that when you pour the neem oil, use a stirring implement like a spoon or whisk to blend it with the water. Stir gently and continuously to ensure even dispersion.

After the initial amount of neem oil is well mixed, add another portion of oil using the same process as before. Gradually incorporate the remaining neem oil by repeating the gradual addition and stirring.

Throughout the process, closely observe the mixture. If you notice any oil droplets or separation, continue stirring until the oil is fully emulsified. This step is crucial to achieving a homogeneous mixture that will effectively spray onto your plants.

4. Add the Liquid Soap

When selecting a plant-friendly liquid soap, choose mild options like Castile or insecticidal. Steer clear of dish soap or detergents containing harsh chemicals, as they pose a risk to your plants. You’ll only need a small amount of soap compared to the neem oil and water. A few drops will suffice for effective emulsification, so there’s no need for precise measurements.

Soap breaks down the oil into smaller particles and evenly sprinkles it in the water. This emulsification process ensures that the neem oil remains well mixed when sprayed on plants, preventing separation, and you will notice how helpful this step is in the process.

Gently stir the mixture after adding the soap to blend the neem oil, water, and soap. Avoid vigorous stirring to prevent excessive foaming. During the stirring process, expect some foam or bubbles to form due to the soap.

Now, just as you see that the mixture settles, the foam will gradually dissipate. To enhance emulsification, consider using other natural emulsifiers, such as aloe vera gel or horticultural oil. These alternatives provide additional stability to your neem oil insecticide.

5. Mix Thoroughly

Using a long-handled spoon or stir stick, gently stir the neem oil, water, and soap mixture in a circular motion. Start from the center and gradually work your way outwards, so you can continue stirring for several minutes, scraping the sides and bottom of the container. This will help incorporate any oil or soap that may have settled.Mixing Neem Solution Thoroughly

Pay attention to the consistency of the mixture, and the key here would be that you begin to observe a cloudy or milky appearance, indicating that the oil is evenly distributed throughout the water. This is an important sign of proper emulsification.

If you notice oil droplets floating on the surface or the solution appears separated, continue stirring more vigorously to encourage emulsification. Take your time while mixing, ensuring that the oil and water are thoroughly combined. Be patient, as neem oil can take some effort to incorporate with water fully due to its natural properties.

Avoid using excessive force while stirring, as this can create excess foam or bubbles in the solution. Gentle, consistent stirring is key. Once you’ve stirred the mixture for several minutes, set it aside for a few additional minutes. This resting period stabilizes the emulsified neem oil and prevents it from separating when applied to plants.

6. Let the Mixture Sit

Once you’ve mixed neem oil, water, and soap thoroughly, it’s crucial to let the mixture rest briefly. This allows for complete emulsification, ensuring a stable and potent spray. During this waiting period, the soap’s emulsifying agents work their magic, binding the oil and water together, in the right way.

However, you must be mindful that the waiting time here would be of five to ten minutes suffices, but you can extend it if desired. During this resting period, you may notice some separation or cloudiness, which is normal and nothing to worry about. Neem oil can appear cloudy or form small droplets due to differences in density.

Simply give it a gentle stir before transferring it to a spray bottle, and it’s ready for use. By allowing the neem oil mixture to rest, you optimize the spray’s effectiveness through proper emulsification and distribution of active compounds.

7. Test the Spray

To test the plant’s response to the neem spray, select an inconspicuous part like the underside of a leaf or a small section of the stem. This will serve as a test spot. Apply neem oil mix that you previously prepared. For instance, if you diluted two tablespoons of neem oil in a gallon of water, maintain the same ratio for this test.Neem Oil Spray 1

Use a brush or cotton swab to coat the chosen area evenly with the neem oil insecticide mixture. Allow the spray to sit on the test spot for at least 24 hours, closely monitoring the plant for adverse reactions. Afterward, examine the test spot for leaf discoloration, wilting, spotting, or other negative effects.

If no visible damage indicates that the plant tolerates the neem oil well. On the other hand, you should also notice that the plant’s reactions may occur with a delay; continue observing the test spot for a few more days to ensure no delayed signs of damage, as this would also depend on the type of plant you have.

If the test spot shows no adverse effects, it’s generally safe to apply the neem spray to the rest of the plant to control pests. Nonetheless, if you notice severe wilting, leaf curling, or browning, refrain from using neem oil on that specific plant, even if you want to kill bugs.

8. Transfer the Mixture to Spray Bottle

Prepare an appropriate, clean spray bottle for your neem oil mixture. Ensure the bottle is in good condition and equipped with a fine mist spray nozzle. Carefully pour the neem oil mixture directly into the spray bottle for containers with wide openings, but if the opening is narrow, employ a small funnel to avoid spills and ensure a tidy transfer.

Gently pour the neem oil mixture into the spray bottle, leaving some space at the top for proper shaking before each use. Avoid overfilling the bottle, and now you should make sure that you securely seal the spray bottle with its cap or nozzle, ensuring a tight closure to prevent leaks or accidental spills.

Label the spray bottle with the contents and preparation date, a helpful practice to track solution age and avoid confusion when multiple sprays are used. Before applying the neem spray to your plants, vigorously shake the spray bottle to mix the ingredients thoroughly, the reason is that this ensures an even distribution of neem oil and soap for effective application.

Before using the neem spray on your plants, test the spray nozzle by dispensing a small amount of water in an empty area. Check for any blockages or irregular spray patterns. If there isn’t, continue to spray neem oil on your plants to treat diseases and plant pests. And there you have it, your very own neem spray for plants.

9. Prepare the Spray

Neem oil spray is generally safe for most plants, including flowers, vegetables, fruits, and ornamentals to get rid of garden pests. However, some sensitive plants, such as ferns and varieties of orchids, may react adversely to neem oil.

It’s always a good idea to test the spray on a small area of the plant. After spraying, observe for any negative effects before applying it extensively.

You can also consider that this spray is safe to use on edible plants. However, following the recommended waiting period mentioned on the product label before harvesting any edible parts is important.

Typically, waiting at least a few days to a week after the last application before consuming the produce is advised. It’s also best to wash the produce first before consumption.


Before we end this article, let’s go over some quick reminders about making neem oil spray solutions for your plants:

  • Mix neem oil, mild liquid soap, and water in a ratio of two tablespoons of neem oil per gallon of water.
  • Apply the spray evenly to the entire plant, including both sides of the leaves and affected areas.
  • Test the spray on a small area first to check for adverse reactions.
  • Applying neem oil is best done in cooler temperatures and repeat every seven to fourteen days for best results.

With neem oil at your side, you’ll never be afraid of pests and diseases again.

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