Coffee grounds as a home remedy for mosquitoes? How to drive away the tormentors!

With the summer temperatures, many people now particularly enjoy being in the garden, on the balcony or on the terrace. Unfortunately, the mosquito season also begins with summer. From an irritating buzz to an itchy bite – mosquitos can make outdoor activities almost unbearable. If you’re looking for an easy fix how to do that Drive away mosquitoes on the terrace or when grilling in the garden try coffee grounds!

Idea for natural mosquito repellent

home remedies against mosquitoes on the terrace

In many regions of the world mosquitoes are one of the most annoying pests. Not only can they cause allergic reactions and cause a lot of restlessness, but also a variety of transmit diseases, including Zika virus, West Nile virus, Chikungunya virus, dengue and malaria.

Mosquitoes repel home remedies

To the best practices for mosquito repellent Include the use of mosquito repellent sprays, citronella candles, lotions and even bracelets. While some chemical mosquito repellants on the market are very effective, the cost of using them on a regular basis can get quite high. There can also be concerns about the ingredients in the products and the possible effects on their health. With these concerns in mind, many people are looking for alternative ways to use natural mosquito repellants – such as using mosquito-repellent plants, essential oils, or, as we’ll see in this article, coffee grounds.

Coffee is an effective home remedy for mosquitos

The best part about using coffee grounds instead of commercial mosquito repellants is that Absence of toxins. Therefore, it is safe for outdoor use where children and pets are playing. According to the Environmental Protection Agency (EPA), coffee is an effective home remedy to keep pesky insects like ants and slugs out of the garden.

Coffee grounds burn against mosquitoes outside

Coffee grounds burn against mosquitoes in aluminum foil in the garden outside

Most vermin have a keen sense of smell. Coffee grounds also have a strong odor, but they get stronger if you burn them. In addition, insects associate smoke with danger, which is why the smell of burning coffee grounds scares them off and drives them away. This method will blow your mind – it’s free, environmentally friendly, and it really works!

Light up coffee grounds outside against mosquitoes

Just follow these steps:

  1. When you make your own coffee, collect the coffee grounds.
  2. Spread the moist coffee powder on a baking sheet or on a flat plate and put everything in a sunny spot to dry it. It is important that the coffee grounds are properly dry so that they can burn well. The powder takes about a day to dry.
  3. As soon as the coffee grounds have dried, place them on a sheet of aluminum foil or in a grill tray.
  4. Now all you have to do is light the coffee grounds, e.g. with charcoal or kitchen paper.
  5. Let the smoke of the burning coffee grounds dance in the air and drive the mosquitoes out of the garden.
  6. You can further enhance the effect of the frankincense by adding a few fresh sage leaves or sprigs of rosemary.

Coffee grounds burn on the terrace as a home remedy for mosquitos

If you’re hosting a gathering or barbecue, why not place several of these mosquito repellants around your garden or patio so your guests can enjoy their time outdoors in peace.

How can you still use coffee grounds against mosquitoes??

Mosquito larvae in water

There are some studies that suggest that coffee grounds can be used as a home remedy against Mosquito larvae in stagnant water (e.g. rain barrel and garden pond) and against Sciarid gnats in the Potting soil can be effective.

In 2006 the team discovered the Biologist Alessandra Laranja from the Institute of Biosciences, Letters and Exact Sciences (Ibilce) of the UNESP “Universidade Estadual Paulista” that 500 micrograms of caffeine per milliliter of water block the development of the larvae in the second phase of their life cycle and thus prevent them from reaching adulthood. The biologist argued that Altered caffeine esterase enzymes, which are responsible for basic physiological processes such as hormone metabolism and the reproduction of mosquitoes. Caffeine also reduces the lifespan of adult mosquitoes, especially female mosquitoes that carry the dengue, chikunguya, and zika viruses.

Coffee grounds against mosquitoes in the potting soil

The biologist explained that it is not necessary to dilute the coffee grounds with water in order to use them. He can directly into flower pots, orchards and vegetable gardens, drains, sewers and generally in any container that is outdoors and can hold water (tires, bottles, cans, boxes, etc.). However, a solution of four tablespoons of coffee grounds and a glass of water makes this natural larvicide easier to use.

Against mosquitoes in the potting soil Cold coffee diluted with water in a ratio of 1: 1 is also effective. However, this should not be exaggerated. Sciarid gnats typically have a lifespan of 3 to 7 days.

Coffee against mosquitoes in water

You can also put the coffee solution in an atomizer and use it to fog the plants. Since the mosquito can breed even inside a bromeliad or in very thin layers of clean water, Laranja recommended spraying this natural insecticide on plants and any suspicious areas.

Coffee extracts were again used in 2012 to prevent larval development and to kill both Aedes aegypti and Aedes albopictus mosquito populations – both caffeinated and decaffeinated versions. A 2015 study also showed that mosquitoes can get through the darker color of coffee-treated water will keep eggs from laying. And if they do, the larvae die, as has already been proven.


1. Scielo Brazil (2006) Caffeine effect on mortality and oviposition in successive generations of Aedes aegypti; Alessandra Theodoro Laranja

2. Front Physiol (2012); Modulation of La Crosse Virus Infection in Aedes albopictus Mosquitoes Following Larval Exposure to Coffee Extracts; Nicole E. Eastep

3. Parasites & Vectors (2015); Coffee and its waste repel gravid Aedes albopictus females and inhibit the development of their embryos; Tomomitsu Satho

4th. The EPA Blog (2009) Climate for Action: New Uses for Used Coffee Grounds