15 Homemade Organic Gardening Sprays That Actually Work (2024)

1. Tomato Leaf Spray

Tomato leaf spray is effective for killing aphids and mites. It works because the alkaloids in the tomato leaves (and the leaves of all nightshades, actually) are fatal to many insects. Simply soak 2 cups (473 milliliters) of chopped tomato leaves in 2 cups of water overnight. Strain the liquid the next day and discard the leaves. Add 2 more cups of water to the mixture and spray it on your plants.

2. Garlic Oil Spray

Garlic oil spray is a great, safe insect repellent. Simply put three to four cloves of minced garlic into 2 teaspoons (10 milliliters) of mineral oil. Let the mixture sit overnight, and then strain the garlic out of the oil. Add the oil to 1 pint (473 milliliters) of water, and add 1 teaspoon (5 milliliters) of biodegradable dish soap. Store in a bottle or jar, and dilute the mixture when you use it by adding 2 tablespoons (30 milliliters) of your garlic oil mixture to one pint of water.

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This mixture works because the compounds in garlic (namely, diallyl disulfide and diallyl trisulfide) are irritating or deadly to certain pests (mostly insects). The oil and soap help the mixture stick to plant leaves. What insects does garlic oil repel? Whiteflies, aphids and most beetles will avoid plants sprayed with garlic oil. A word of caution: Don't apply this spray on a sunny day, because the oils can cause foliage to burn.

3. Hot Pepper Spray

Hot pepper spray is a great solution if you have problems with mites. Simply mix 2 tablespoons of hot pepper sauce, a few drops of biodegradable dish soap and 1 quart (0.94 liters) of water and let it sit overnight. Use a spray bottle to apply the spray to infested plants.

Hot pepper spray works because the compound capsaicin, which causes the "heat" in hot peppers, is just as irritating to insects as it is to us (if you've ever sliced a hot pepper and gotten any of it in an open cut, you'll understand). This mixture also helps repel whiteflies, but it may have to be reapplied if you start to see the mites or whiteflies returning.

4. Soap Spray

Simple soap spray is useful in taking out a wide variety of common household pests, including aphids, scale, mites, and thrips. Just add 1 tablespoon of dishwashing soap to 1 gallon of water and spray the mixture on the pests.

Why does this method have guaranteed results? The soap dissolves the outer coating or shell of the insects, eventually killing them.

5. Beer

Sink a tuna can or pie plate into the ground and add a couple of inches of beer, up to about 1 inch (2.5 centimeters) below the top of the container. Beer works because the slugs are attracted to the yeast.

It's really important to sink the container into the soil and keep the beer about an inch lower than the soil. This way, the slugs have to go down after the beer, and they drown. If the beer is near the soil, the slugs can just have a drink and then go and munch some hostas when they're done with happy hour.

6. Citrus Rinds as Slug Traps

If you don't have beer in the house, but you do have oranges, grapefruits or lemons, give this a try. You don't even need to create a spray — simply place the citrus peels on the ground and collect the slugs they attract.

7. Newspaper Earwig Traps

Newspaper earwig traps work well for reducing the population of these sometimes-pesky insects. Just roll up a newspaper and secure it with an elastic band. Dunk it in water to get it wet and lay it in the garden between problem plants. Check the trap daily and dunk the newspaper rolls into a bucket of water to remove the bugs.

8. Cinnamon or Cayenne Pepper

Ground cinnamon or cayenne pepper sprinkled around your plants works by repelling, but not injuring, ants. This approach works just as well for ensuring a bug free home.

9. Red Pepper Spray

Red pepper spray works well for making your plants less tasty to mammal and bird pests. If bunnies, deer, mice, squirrels and birds are regularly messing with your garden, make the following mixture and spray target plants weekly.

Mix 4 tablespoons (59 milliliters) of Tabasco sauce, 1 quart (0.94 liters) of water, and 1 teaspoon (5 milliliters) of dish soap. The capsaicin in the pepper spray will irritate the animal pests, and they'll look for less spicy fare elsewhere. At the very least, it's a much safer deterrent than pesticides, which could harm mammals.

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15 Homemade Organic Gardening Sprays That Actually Work (2024)

FAQs

What is the best homemade insecticide for vegetable gardens? ›

What can I spray on my vegetable garden to kill bugs? The most basic spray insecticide you can make will require 8 ounces of vegetable oil and 1 tablespoon of dish soap. Mix the two together well and then add 2 teaspoons of any fragrant oil. You can also choose to add cottonseed oil for lasting effects.

What is the most powerful natural insecticide? ›

Neem (Azadirachta indica)

The most effective insecticide comes from the seed, but the leaves can also be used. These extracts do not kill insects directly but effectively prevent their reproduction.

How to make organic garden spray? ›

Mix 1 cup of vegetable oil with 1 tablespoon of mild liquid soap. Add 2-8 teaspoons of this mixture to 1 quart of water and spray your plants as above. The oil in this spray smothers the insects, so it is effective on aphids, thrips, mites, and scale.

How do you make homemade garden disinfectant? ›

Homemade Outdoor All-Purpose Cleaner:
  1. 1 cup white vinegar.
  2. 2 cups water.
  3. 2-3 pumps of foaming hand soap.
May 17, 2021

What can I spray on my vegetable plants to keep bugs off? ›

Vinegar spray

Simply mix one cup of white vinegar, at Walmart, with three cups of water. You can also add half a teaspoon of dishwashing soap to help the solution adhere. Shake thoroughly and apply to the affected areas. The acetic acid in the vinegar will treat a wide range of garden pests but it requires contact.

What to spray on tomato plants to keep bugs away? ›

Spraying with insecticidal soap, Neem oil, or pyrethrin spray. Vacuuming from plant with a small handheld device (weird, but works).

How to make organic pesticide at home? ›

To make a basic oil spray insecticide, mix one cup of vegetable oil with one tablespoon of soap (cover and shake thoroughly), and then when ready to apply, add two teaspoons of the oil spray, mix with one quart of water, shake thoroughly, and spray directly on the surfaces of the plants which are being affected by the ...

What is a homemade substitute for neem oil? ›

Rosemary Oil is a Highly Effective Alternative to Neem Oil Spray with a Pleasant Smell.

How to stop insects from eating plant leaves naturally? ›

A small teaspoon of Organic soap or black soap mixed with water is a natural insecticide against many pests. I also mix it with the bottom end of a lemon as slightly acidic water can actually harm the protective layer of aphids. When applied, let it sit 15 minutes & then wash the leaves.

What is the best homemade organic fertilizer? ›

15 Easy Organic Fertilizers to Make at Home
  • Fish Tank Water. ...
  • Wood Ash. ...
  • Compost Tea. ...
  • Liquid Seaweed. ...
  • Comfrey Tea. ...
  • Worm Tea/ Wee. ...
  • Poo Tea / Composted Animal Manure Fertilizer. Composted animal manure is great for feeding the garden. ...
  • Weed Tea Fertilizer. Weed tea is made just like comfrey tea.
May 30, 2021

What do organic farmers spray on fields? ›

For example, neem oil is one of the most commonly used pesticide sprays on organic crops that is highly toxic to honeybees. There is a give and take in all agriculture and sadly, even organic has its heartbreaking downsides.

What is the best disinfectant spray DIY? ›

What You'll Need:
  1. 16 oz glass spray bottle.
  2. 15 drops of essential oils.
  3. 1 and 1/4 cups of white vinegar.
  4. 1 and 1/4 cups of water.
  5. 3/4 teaspoons of hydrogen peroxide.
  6. 1/4 cup of alcohol (60% + alcohol content) or rubbing alcohol.
  7. Funnel.
  8. Mixing Bowl.
Sep 20, 2021

How to make natural antibacterial spray? ›

To make your own disinfecting spray that can be safely used on a variety of surfaces around your home, just combine the following ingredients in a large glass spray bottle: 1 cup water, 1 cup white vinegar, 2 tablespoons rubbing alcohol, 20 drops lemon essential oil, 20 drops tea tree essential oil.

What is the best natural disinfectant? ›

However, with research and creativity, there are all-natural options which safely disinfect without any harmful residue for you or your family.
  1. 1 - Vinegar. This clean, natural and biodegradable liquid is more than a cooking product. ...
  2. 2 - Hydrogen Peroxide or Oxygen Bleach. ...
  3. 3 - Alcohol. ...
  4. 4 - Essential oils.
Jan 25, 2022

Can you use vinegar and Dawn as insecticide? ›

In fact, several products that attract fruit flies employ a vinegar attractant and a trap to help capture and control fruit flies. A container containing vinegar and dish soap can function as a trap since the vinegar lures flies to enter the trap and the dish soap will cause the flies to sink inside the trap and die.

Does vinegar keep bugs off vegetable plants? ›

Vinegar is a natural bug repellant and also makes a great weed killer. Garden Guides suggests using one part vinegar - white or apple cider vinegar are great options - with three parts water in a spray bottle.

How do I get rid of pests in my vegetable garden? ›

The easiest way to capture insects is with a trap. Place traps 30 inches from the plants you are protecting to lure pests away from the garden. Try mulching with aluminum foil or reflective material to repel aphids and other insects.

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