15 Best Organic Insecticide For Vegetable Garden You Have To Try To Keep Your Plants Safe

The time comes when simple methods are just not enough. Sometimes the pests are too persistent; sometimes they are entirely resistant (and it even rhymes) to all the things I have done to avert them from my precious plants. Therefore, I’m giving you 15 best organic Insecticide for vegetable garden which I have found to be more than enough to keep the pests at bay.

As I said in my previous article, nonlethal methods are sometimes not enough. I’m not proud of using these ways, but this is the world where stronger ones prevail.

15 Best Organic Insecticide for Vegetable Garden


1. Tomato Leaves (Ironically)

Tomato Leaves

In case that you didn’t know, tomatoes are from the family of nightshades, which are known to be toxic. Now, I have used this to my advantage, and took about a handful of leaves, which can be taken from the lower sections of the plant, and chopped them like I would do when preparing dinner.

These were left in 1 quart of the water overnight. The ingredient of the leaves called tomatine was infused into the water this way, and all there was left for me was to drain the remains of the leaves and pour the remaining water into a sprayer and apply it. The main advantage of this pesticide is that it is entirely natural, and easy to make. Therefore, if you have trouble with aphids or even snails, this is the first recipe you should try.

2. Garlic Is Not Just For Vampires


This is the second line of defense, in case that tomatoes are not doing very well. The combination of garlic aroma and vegetable oil will do the right job.

Take two bulbs of garlic, peel them and crush using a kitchen knife. Some people are suggesting to mash them in a blender, but I have a feeling that too much is wasted this way. Now, pour a bit of water over it, and let it sit overnight. This mixture can be used with water to keep the pests away, but for better results, combine it with the next one, which is lethal.

3. Cooking Oil

Cooking Oil

Garlic is good at keeping the pests far away from your plants, but to further improve it, use this approach. Note that this recipe can be used independently, and the only reason why I’m listing it is that these two are great as a combo.

Take about ½ cup of any vegetable oil, and pour it into the jar. This dish is the best by far because of its even shape and tight cover, so it is convenient to shake. Add about one tsp of any organic liquid soap and fill up the rest with water. Shake thoroughly, because water and oil are hard to mix, and the soap is there to make the mixture compact. Pour it into the spray bottle and start spraying. The oil is thick and will clog the pores on the skin of the insects, thus killing them.

4. Neem Oil To Shake And Spray

Neem Oil

This was somewhat new to me. A subspecies of jasmine plant, neem tree can be used as an insecticide. To be more specific, the oil gained from its roots is used in gardening for some time, but just recently it increases in popularity because of its safe usage near pets, humans and is considered as safe for surrounding.

You will need about two tsp of this oil, mixed in a jar with a bit of soap. Again, the same approach as with vegetable oil, but neem tree oil has the effect of neutralizing hormones. This is especially effective when used against ants or aphids because these two species are relying on the use of hormones. Disrupt that, and the colony is done.

5. Chrysanthemum Is Not Just The Flower


On several occasions, I have recommended using pyrethrin for successful dealing with mites and aphids. In case that you didn’t know, Chrysanthemum flowers are containing this ingredient, but to use it to its fullest, some cooking must be done.

Take about 3.5 ounces of dried flowers and boil them in 0.25 gallon of water. After it is cooked for 15 minutes, leave it to cool down and strain it through a cloth. Pour it into water sprayer, add some water to fill up the sprayer and start shooting. This element affects the nervous system of the pests, and besides knocking them out, it also suffocates them.

6. Tobacco


Not just for smoking, tobacco can be used as an insecticide. Note that this approach can hold far from solanaceous families, such as tomatoes and eggplants.

To make it, use organic-grown tobacco, put about 4 ounces in a gallon of water and leave it for 24 hours. After that, if the water is too dark, dilute it with more water, and if it is brighter than tea, leave it to sit more. This mixture is excellent because it can be used right away, without preparation.

7. When Life Gives You Lemons……You Make An Insecticide


To make this mixture, first, you will need peels from oranges or lemons. These are rich in aromatic oils which primary targets are ants, aphids, and slugs.

First of all, you will need peels, about a handful, or one cup. Next, put those in a pot and pour boiling water over. It is vital that the water is boiling; it will accelerate the process of absorption. Leave it covered for 24 hours, and after that separate the peels and use the mixture. 

8. Diatomaceous Earth

Diatomaceous Earth For Everything With Exoskeleton

Although this is not strictly organic in origin, this recipe is natural so that it may be taken into consideration. Diatomaceous earth is mineral which is made of remains of algae. Its main feature is that absorbs lipids from bug’s exoskeleton. Simply put, it dehydrates them to death.

To use it, you have to buy it first, since it cannot be made. Luckily, it is available in almost every garden store. I had just to sprinkle it on the ground around affected plants and over leaves as well. Keep in mind that since it has dusty shape, in case of rain, it must be applied again.

9. Baby Shampoo 

Baby Shampoo

Luckily, there are a lot of manufacturers who are making all-natural baby shampoos. These can be used for making a mix for killing the pests.

Just mix two tsp of shampoo with a gallon of water, shake thoroughly, and spray onto the plant. This approach should be taken early in the morning or the evening since drying out can leave residue on plants, which is not pleasant to have.

10. Jalapeno Peppers

Jalapeno Peppers

In general, any kind of chili peppers can be used for preparing of this mixture, but I have found that jalapeno is among the most effective, due to the strength of its taste and smell.

I have used about ½ of a cup of peppers and a quart of water. This two were joined in a pot and boiled for a few minutes. Leave it to cool, and filter the peppers. This mixture can be applied efficiently to areas affected by different pests, including aphids and ants. Keep in mind that the safest way to deal with peppers is by wearing gloves. I have learned that the hard way, since my nose was itchy.

11. All In One

All In One

Not a separate recipe, but the combination of some mentioned here, all in one can be used for any pests since it uses peppers, garlic, and onion. It is suitable for those who can’t efficiently identify pests which are troubling them.

Take one small onion, ½ cup of chili peppers, and one bulb of garlic. Pour water and let it sit for about an hour. Strain it, and dilute with water and add a few drops of soap. Shake it vigorously and spray the solution all over the affected area.

12. Essential Oils

Essential Oils

This is somewhat a group of oils, and the preparation of all is the same, so I will just say that one tsp should be added with a few drops of soap into a sprayer and shaken.

However, not all oils are suitable for all pests. Therefore, if you have an issue with flies and mosquitoes use rosemary oil, for spiders, aphids and fleas try peppermint, while cedarwood and pine oils will keep the slugs and snails at a distance.

13. Insect Corpses (It Can’t Get Weirder Than This)

Insect Corpses

At first, I was in awe. Then disgusted, but eventually I decided to try. I have combed through spider webs in my shed, to collect a sufficient number of dead bugs. I have ground those remains into powder and mixed it with water and applied to plants.
To my surprise, it was very active, probably because of the smell which remained after the appliance. 

14. Beer For The Slugs

Beer For The Slugs

Although it sounds funny, the truth is that slugs are attracted to beer yeast. To use this to your advantage, you will need a plate or an empty tuna can. Less than pesticide, this is a trap, but since it is an organic and effective one, I had to include it.

First of all, the container needs to be dug into the ground a few inches, not to let slugs exit the trap. Pour a few inches of beer and let the slugs to come. After falling into the trap, they will drown.

15. Salting The Snails

Salting The Snails

Not that I have something personal against the snails, but they made my cabbage not as lovely as they should be.

The recipe is simple, just sprinkle the salt over a snail, and it will kill them instantly. Salt makes them dehydrated. Hydration is vital for snails to survive, so cutting off that feature will end their lives.


I have used these 15 best organic insecticide for vegetable garden only as a last resort. Of course, as I said, sometimes pest control will fail, so one of these have to be utilized. Luckily, the list is here for a quick reference, and I hope that it will be helpful.

As always, I hope that you will leave your questions, comments, and suggestions in the comment section below.

1 thought on “15 Best Organic Insecticide For Vegetable Garden You Have To Try To Keep Your Plants Safe

  1. I have tried the marigold thing and it hasn’t worked for me. I have marigolds in all my planter boxes and i have praying mantis, grasshoppers, worms and I’m not sure what else destroying my veggies and herbs

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