I started using neem oil in my garden a few years ago to get rid of spider mites and aphids, and I’ve grown to adore it. I’ve had great success using neem oil, which naturally repels insects, especially when it comes to keeping the pests away from my tomato plants.
But I recently discovered a hard lesson: Neem oil simply isn’t a favorite among all plants. Thus, the issue arises: Which plants should you avoid using neem oil on?
Herbs like basil, caraway, cilantro, dill, marjoram, oregano, parsley, or thyme shouldn’t be sprayed with neem oil. Neem oil should only be sprayed sparingly on plants with fragile or wispy leaves, such as spinach, arugula, lettuce, and peas, to avoid burning the foliage.
Be careful while mixing and applying neem oil, though, as even hardier plants with tougher foliage might be scorched (or even killed) if you don’t.
Neem oil is made to cover a plant’s leaves and any invasive insects lurking among them in an oily film that will suffocate some insects and harm many others by damaging their cells. Neem oil is an oil, though, so even on a moderate day, if you ignore good advise and spray at the wrong times, you risk literally cooking the leaves of your plants.
In light of this, let’s look at a list of plants that tolerate neem oil, those that are sensitive to neem oil, and those that don’t actually require neem oil because they already ward off many of the most pesky bugs.
Can neem oil be used on any indoor plant?
The majority of indoor plants can be used safely with neem oil, a multipurpose natural pest control treatment. This 100% cold-pressed neem oil, which is made from the seeds of the Indian neem tree, has a wide range of applications in the maintenance of indoor plants and is OMRI-listed for organic gardening. Our go-to natural remedy for controlling houseplant pests like mealybugs, thrips, aphids, and whiteflies is azadireachtin, which disrupts the hormones of insects, preventing them from maturing and eating.
Neem oil has natural anti-fungal qualities in addition to insecticide ones, therefore it can be used to successfully stop the spread of fungus, fungus, and powdery mildew. Because it leaves a lovely sheen on foliage, it is frequently sold as “leaf shine” – an extra bonus!
Simply mix 1.5 teaspoons with a quart of warm water to make a spray, then apply to both sides of foliage. During treatment, keep plants out of direct sunlight.
Although most plants can tolerate neem oil, certain plants might not. Before spraying an entire plant, test on a single leaf. Visit our blog to learn more about pest control.
Neem oil—does it harm any plants?
I prefer to use natural insecticides wherever feasible as an organic gardener, especially when it comes to my vegetable plants. I’ve read a lot about neem oil’s effectiveness in battling fungus and insect infestations. However, I have also seen conflicting accounts concerning its safety. I made the decision to research it and learn the truth as a result.
Neem oil applied to plants is it safe? Neem oil is safe, yes. India has been using neem oil as a pesticide on plants for more than 400 years. Neem oil application doesn’t hurt the crops, the people who consume them, or the environment. Neem oil should not be sprayed directly onto the skin since some people may experience an allergic or respiratory reaction.
It turns out that neem oil is a fantastic tool in the ongoing battle against garden pests. It is a useful tool to have in the arsenal even though it cannot resolve all issues. Neem is the only plant that has the natural pesticide used in neem oil. As an insecticide, it is non-toxic. It matters what kind of neem is used, as well as how it is applied. Before using neem oil to treat insect infestations in gardens, it’s necessary to understand the following.
If neem oil is sprayed on the plants, such as lettuce and kale, can I harvest and eat those greens right away, or do I have to wait a certain length of time?
It is acceptable as long as the greens are fully cleansed. It makes no sense to apply the oil to the kale before harvesting, though. Kale should be harvested before spraying. On plant leaves, neem oil degrades in 2 to 5 days. The best scenario is to spray well in advance of when you plan to harvest.
Is neem oil safe for humans, dogs, and cats?
Neem oil is deemed generally safe for humans by the FDA. Toothpaste, shampoos, and soaps all include extracts from neem oil. However, the items don’t include neem in its whole and aren’t exactly the same as what is found in insecticides.
Neem can be hazardous if not used correctly. Neem oil applied correctly to plants and vegetables won’t produce dangerous quantities. All treated veggies should, however, be washed before consumption. The oil can be eliminated with a vigorous water wash.
Skin irritation or an allergic reaction may be brought on by neem oil. When working with neem, for instance, caution is always suggested, as is wearing protective clothes.
Neem is not listed as hazardous to dogs or cats by the ASPCA. Animals living in water are only mildly poisoned by neem oil.
Which pests does neem oil kill?
Only soft-bodied insects, larvae, and eggs are effective with neem oil. Although it can kill their larvae, it does not harm insects with hard bodies, such as beetles. In addition, it functions as a fungicide for white powdery mildew.
Aphids, mealybugs, caterpillars, spider mites, lace bugs, thrips, whiteflies, cabbage loopers, leafhoppers, leafminers, and beetle larvae are a few of the pests that neem oil is effective against.
Not only that, but we also take joy in our pain because God’s love has been poured into our hearts by the Holy Spirit who has been given to us, and joy does not put us to shame; it generates endurance; endurance builds character; character produces hope; and hope does not put us to shame.
How does neem oil work?
Neem oil has two purposes. The oil sprayed onto the plant coats its leaves. The oil enters the insect’s respiratory system as it consumes the leaf, suffocating it.
Azadirachtin, a natural pesticide, interferes with insect systems. They don’t feed, fly, or mate; it inhibits all their hormonal behaviors, and eventually, they will die off.
Neem oil takes time to start working. The insects entirely pass away after around 72 hours. Sometimes results are seen in less than a day, but the entire impact takes longer.
Does neem oil harm beneficial insects?
Because they are not consuming the sprayed leaves, beneficial insects like bees, butterflies, and ladybugs are not harmed by the insecticide. They might touch the leaves, but that won’t do any harm. If they are on the leaves, butterfly or ladybug eggs and larvae may be harmed. Use it sparingly and only on plants that are plagued with pest insects; avoid applying it widely.
Neem oil kills all insects when applied because it blocks their airways and causes them to suffocate. Neem oil treatments should be made in the morning before butterflies and bees emerge in order to protect beneficial insects. Additionally, to reduce any negative effects, only spray the harmed plants.
Which neem oil product is best?
There are numerous ready-spray neem-based insecticides available at the garden center. The majority of these include neem oil’s hydrophobic extract. This extract is neem oil fragments mixed with an alcohol or chemical. The organic pesticide azadirachtin is absent. Avoid using these products. They accomplish nothing beyond what vegetable oil accomplishes.
100% pure, cold-pressed neem oil is the best neem pesticide product. This has azadirachtin as well as all the other qualities of neem seeds. Prior to usage, it must be mixed, however mixing it is easy.
Here is a link to the 100% cold-pressed neem oil from Amazon that I used for the images up above.
Where should neem oil not be used?
Neem must be mixed and applied correctly in order to be effective; otherwise, it could harm plants, beneficial insects, or aquatic life.
Where NOT to use Neem OIl
Neem oil is safe for many species, however when applied topically to plants as a foliar spray, it doesn’t distinguish between good and bad insects.
Health hazards may also result from its capacity to interfere with hormones in some situations.
Here is a critical list of situations in which you should not use specific neem products:
- NEVER apply foliar sprays during the day because it can come into touch with bees and other helpful insects and pollinators. Check out Neem Oil and Bees.
- Never use neem foliar sprays in close proximity to beehives as the wind could blow droplets to the nest.
- NEVER use neem products in close proximity to any body of water that has aquatic life. Neem products are prohibited in Canada and the UK because it is somewhat harmful to many fish and amphibian species.
- AVOID using while there are kids or pets present because they might consume more neem than is safe.
- Neem has been known to cause seizures or other ill effects when consumed by young children, though these risks decrease as the child gets older. NEVER leave neem items around little children.
- If you are pregnant or nursing, AVOID getting into close touch with neem products since it can lead to problems or even miscarriage and may also contaminate your breastmilk.
Testing Plant Tolerance
In the meanwhile, plants that ought to be neem-tolerant may experience sensitivity or an allergic reaction, just as people occasionally do to peanuts or other typically harmless goods.
Apply a very small amount to a single, isolated area of your plant to test it.
Apply foliar sprays to a single leaf, and use an eyedropper to give a few drops of soil soak to the stem of a plant close to the base.
A plant should not be treated with neem treatments if it exhibits symptoms of sensitivity.
While some manuals advise testing before each usage, others view it as a one-time thing.
Since plants might change their sensitivity over time, we advise using your own judgment when deciding how frequently to test, but you should aim to do so at least once each year.
When to Apply Neem Oil
Neem oil, as previously indicated, can harm both good and evil insects if used improperly.
Always apply any necessary medicines at dawn or dark to protect bees, ladybugs, and other garden creatures.
Neem foliar sprays evaporate within 45 to 1 hour, so they won’t be present when these assistants begin their daily (or nighttime) routine.
Avoiding sunburn on indoor or outdoor plants is another justification for applying at these periods.
Applying neem oil when the sun is up increases the chance that the sunlight will scorch the leaves because neem oil is mixed with warm water.
Neem is typically non-toxic, but you shouldn’t eat any when you’re eating fresh produce.
In order to avoid mistakenly overwatering a plant, it is also recommended to administer soil soaks when the plant is thirsty.
Applying Foliar Sprays
Foliar sprays need to be administered more regularly and require more effort than soil soaks.
Spray the entire plant, being care to reach any crevasses and the undersides of all the leaves.
You will need to reapply every other day for 14 days during bug outbreaks.
Spray on the Foliage to Prevent Pests
To get rid of powdery mildew, prepare a solution of 10ml neem oil in 500ml of water, and spray it on the leaves. It can be applied to any indoor plant that has the disease. Be sure to thoroughly shake the bottle before using it.
It can be applied to indoor plants such African violets, Pothos, Jade, Rosemary, Begonias, and Poinsettias.
2. Aids in Aphid Elimination
Neem oil can be used to safely get rid of aphids. In a liter of water, combine 1 teaspoon of organic neem oil with 4 tablespoons of mild liquid soap. Spray the mixture on the afflicted regions of the plant after filling a spray bottle with it and giving it a good shake.
It works for pothos, philodendrons, and any other indoor plants with the problem.
Kill Whiteflies with Neem Oil
Neem oil has lasting properties that repel and deter whiteflies from returning, so it can control an invasion of them. Neem oil and liquid soap are combined with half a teaspoon each, then one liter of water is added.
Combine all components, then pour the resulting mixture into a spray bottle.
Use it directly on your plants’ foliage and on whiteflies.
Before using the solution on the entire plant, always run a quick test on one or two leaves.
Use Neem Oil on Thrips
Spraying a mixture of one liter of water, one teaspoon of liquid detergent, and half a teaspoon of neem oil will get rid of thrips. Bugs will die from this mixture.
Control Houseplant Scale
Neem oil works well to treat scales on indoor plants and is a great pesticide for houseplants. Neem oil and liquid soap are combined with half a teaspoon each, then one liter of water is added. Spray it on the affected area after filling a spray bottle with it.
Prevent Mealybugs
Neem oil has a lasting impact that helps to prevent further infestations, although it takes a few days to treat mealybugs before killing them.
Neem oil and liquid soap are combined with half a teaspoon each, then one liter of water is added. Spray the plant with the solution.
Repel Fungus Gnats
Mix one liter of water with half a teaspoon of liquid soap and one teaspoon of neem oil. To get rid of fungus gnats, pour this solution into the pot right away. Water the plant thoroughly before continuing.
Remove Spider mites
Although it takes some time, neem oil is quite effective at preventing spider mite infestation. Before using the neem oil cure, clean the leaves with a moist towel for optimal effects.
Recipe:
- 1 teaspoon gentle liquid soap
- Neem oil, 1/2 tsp.
- lukewarm water, 1 liter
Spray the resulting mixture on the plant’s troubled parts after combining the ingredients.
Bring Shine to the Leaves
Neem oil and liquid soap are combined in a liter of water, and the mixture is then rubbed on the leaves with a delicate cloth to restore their shine.
Mosquito Repellant
Mosquitoes thrive in the shade of indoor plants. Neem oil can be sprayed on the plants to keep mosquitoes away.
To apply to exposed skin, combine 2 ml of neem essential oil with 100 ml of coconut or another carrier oil. Read more information here.