The short answer: a little, in a small still area, and not much beyond that. Scented candles are worth having on a table. They are not fly control, and it is worth knowing the difference before you buy six of them.
What a citronella or scented candle produces is a thin plume of smoke and aromatic compounds. Flies avoid it, so within roughly the radius of that plume — a dining table, a small sheltered corner — you will genuinely notice fewer flies landing. Step outside that radius, or let a breeze through, and the effect disappears almost entirely. The scent does not travel, and it does not repel anything it has not reached.
That is the honest ceiling. Below we cover how the scents work, which ones have any evidence behind them, and how to get the most out of a candle if you are going to use one — but if the goal is actually fewer flies on your patio, a candle is a supporting act at best.
What works better, and why
Two things outperform candles outdoors, and neither costs much.
- Moving air. Flies are weak fliers and avoid a breeze. An oscillating fan aimed across a table keeps flies off it far more reliably than any candle, has no scent, and works regardless of wind.
- Removing what drew them. Bins, pet waste, fallen fruit, a grill grease tray. No repellent competes with a food source; it just sits next to one.
Once those are handled, hanging fly sticks under a covered porch remove the flies already there without any odor at all. Full detail in our guide to keeping flies away outside, or see the fly trap range for what each type catches.
What are Citronella Candles?
Citronella candles are a type of candle infused with citronella oil, a natural essential oil derived from the leaves and stems of citronella grass. These candles are specifically designed to repel mosquitoes sand flies and other flying insects. The distinctive aroma and smell of a citronella candle and oil acts as a deterrent to fly,, keeping insects at bay and reducing the annoyance of their bites.
Citronella candles are a popular choice for outdoor gatherings, such as barbecues, camping trips, and patio parties, where mosquitoes and other flying insects can be a nuisance.
What are the Benefits of a Citronella Candle?
Citronella candles offer several benefits, making them a popular choice for individuals looking to both repel flies and mosquitoes and create a more enjoyable outdoor environment. Here are some of the key benefits of using citronella candles:
Natural Mosquito Repellent
Citronella essential oil itself, the main ingredient in these candles, is derived from natural sources of citronella candle such as citronella grass. It acts as a natural mosquito repellent, effectively keeping mosquitoes and other insects at bay and reducing the likelihood of mosquito bites.
Pleasant Aroma
Citronella candles emit a light, distinctive citrus-like fragrance that many people find pleasant. The aroma adds a refreshing and enjoyable ambiance to outdoor spaces, making them more inviting and comfortable for gatherings and relaxation.
Non-Toxic and Environmentally Friendly
Citronella candles are generally considered safe to use as they are made from natural ingredients. Unlike some chemical-based mosquito repellents, citronella candles do not contain harmful substances that may pose risks to humans, pets, other plants or the environment.
Versatile and Portable
Citronella candles come in many various candle types, sizes and styles, allowing for easy portability, light, and flexibility in their placement.
Cost-Effective
Citronella candles are an affordable mosquito control option compared to other alternatives such as electronic mosquito repellent devices or chemical sprays. They offer a cost-effective solution for creating a mosquito-free environment, especially for short-term outdoor gatherings.
Widely Available
Citronella candles are readily available in stores, including outdoor supply shops, home improvement centers, and online retailers. Their popularity has made them widely accessible, allowing individuals to easily obtain them whenever needed.
Easy to Use
Using citronella candles is simple and hassle-free. Once lit, the citronella candle releases the fragrance and starts repelling mosquitoes. They require minimal effort and maintenance to burn them, making burning them a convenient choice for mosquito control.
How Do Scented Candles Work When Repelling Flies?
Scented candles work as a means of repelling flies by utilizing specific fragrances that flies find unpleasant or overwhelming. Flies have a highly developed sense of smell, and certain scents act as deterrents to flies, discouraging them from entering a particular space. The process of repelling flies with scented smoke and candles can be explained as follows:
Masking Attractive Scents
Flies are attracted to certain scents, such as food, empty garbage cans, or decaying matter. Scented candles release fragrances that help mask these attractive scents, making the environment less appealing to flies. By overpowering or camouflaging the scents that attract flies, scented candles create an environment for fruit flies that is less likely to attract them in the first place.
Disrupting Fly Behavior
Certain candle scents can disrupt the normal behavior patterns of flies, making them less likely to stay or settle in a particular burn area or burn longer. The strong and unfamiliar fragrances emitted by scented candles can confuse flies and disrupt their ability to navigate or locate suitable breeding or feeding sites. This disorientation can discourage flies from remaining in the vicinity of burn candles and drive them away.
Repelling Scents
Some scents have inherent properties that flies find repulsive or irritating. These scents can act as natural, fly traps or repellents, causing flies to avoid the area altogether. When scented plants or candles release these specific fragrances, they create a barrier that flies are reluctant to cross, effectively keeping the flies away from them away.
It’s important to note that while scented candles can help repel flies naturally, their effectiveness to repel the flies away may vary depending on factors such as the type and concentration of fragrance used in outdoor candles, the size of the area, and the number of candles used.
Best Scented Candle Fly Repellent For House Flies
When it comes to repelling house flies, certain scented candles with specific fragrances have been found to be effective. Here are some of the best scented candle options for repelling house flies:
Lemongrass
Lemongrass-scented candles are known to be highly effective in repelling house flies and other insects. The citrusy smell and refreshing aroma of lemongrass is particularly disliked by the fly and fruit flies too, making it an excellent choice for keeping them away.
Citronella
Citronella oil-scented candles are widely recognized as natural insect repellents, including house flies. The strong and distinct fragrance of citronella oil repels the flies away and helps create a fly-free environment.
Peppermint
House flies dislike the strong smell of minty scent smaller candles and strong smell of food with peppermint. Peppermint and basil-scented candles can effectively deter flies and add a pleasant aroma to your living spaces.
Eucalyptus
The strong pine scent of eucalyptus oil is disliked by house flies. Burning eucalyptus oil or burning pine-scented candles can help repel flies and keep them from entering your home.
Lavender
While humans find the scent of lavender calming, some bugs and house flies find it repulsive. Lavender oil-scented lavender candles can not only create a relaxing atmosphere but also act as a deterrent for flies.
When selecting scented candles for repelling house flies, it’s of course important to choose candles made with high-quality essential oils to ensure optimal effectiveness to prevent and keep flies out. Burn and light the candles during peak fly activity times for best results.
How to Use Scented Candles Effectively
Scented candles not only create a cozy and inviting atmosphere but also offer various benefits, including their ability to repel flies and other unwanted insects. To make the most of scented candles and maximize their effectiveness, follow these simple tips:
1. Choose the Right Scents
Select scented candles with fragrances known for repelling flies. Citronella, eucalyptus, peppermint, lavender, and lemongrass are popular choices. These scents are unpleasant to flies and help keep them away.
2. Position the Candles Strategically
Place the scented candles in areas where flies are commonly found or where you want to create a fly-free zone. Focus on entry points such as windows, doors, and outdoor seating areas. By positioning the candles near these areas, you can create a barrier that flies are less likely to cross.
3. Consider Candle Type and Size
Choose the right candle type and size based on your needs and preferences. Jar candles, pillar candles, and votives all work effectively. Consider the size of the area you want to protect from flies. For larger spaces, opt for multiple candles or larger-sized candles to increase the coverage.
4. Protect Candles from Wind
Strong winds can diminish the effectiveness of scented candles. To prevent the wind from blowing out the flame or dispersing the scent too quickly, use candle holders or lanterns that provide wind protection. This will help the candles burn evenly and release the scents consistently.
5. Trim the Wick
Before lighting the candles, trim the wick to about a quarter of an inch. A shorter wick ensures a clean and steady burn, allowing the candle to release its scent more efficiently. Trimming the wick also helps prevent soot buildup and prolongs the candle’s lifespan.
6. Burn the Candles for an Adequate Time
For scented candles to effectively repel flies, they need time to release the fragrance into the surrounding area. Plan to burn the candles for a minimum of one to two hours at a time. This duration allows the scent to disperse and create a stronger deterrent effect against flies.
7. Use Multiple Candles for Larger Areas
If you have a spacious room or an outdoor patio, consider using multiple scented candles placed strategically throughout the area. This approach ensures better coverage and helps maintain a consistent scent barrier against flies.
8. Practice Safety Precautions
Always prioritize safety when using scented candles:
- Never leave lit candles unattended.
- Keep candles out of the reach of children and pets.
- Place candles on heat-resistant surfaces.
- Extinguish candles before leaving the room or going to sleep.
How Long Do Scented Candles Repel Flies?
Scented candles are a popular choice for repelling flies and creating a fly-free environment. However, the duration of time that scented candles effectively repel flies can vary depending on several factors. Let’s explore these factors and understand how long scented candles can keep flies at bay.
Candle Quality and Scent Concentration
The quality of the scented candles plays a significant role in their effectiveness against flies. Furthermore, higher-quality candles made with natural ingredients and essential oils tend to have a stronger and longer-lasting scent. Additionally, these candles often contain a higher concentration of the repellent fragrance, allowing them to repel flies for an extended period.
Burning Time
The burning time of scented candles is another crucial factor to consider. As the candle burns, it releases the fragrance into the surrounding area. Additionally, the longer the candle burns, the more time the scent has to disperse and create a deterrent effect against flies.
Scented Candles to Keep Flies Away: Candle Size
The size of the scented candle can also impact how long it repels flies. Larger candles generally have a longer burning time, providing extended protection against flies. Additionally, if you have a larger space to cover, consider using bigger candles or multiple candles strategically placed to ensure adequate coverage.
Scented Candles to Keep Flies Away: Environmental Factors
Environmental conditions can affect how long scented candles repel flies. Factors such as air circulation, temperature, and the presence of other strong odors in the environment can influence the efficacy of the scents emitted by the candles. Additionally, in open spaces with strong wind currents, the scent from the candles may disperse more quickly, reducing the repellent effect on flies.
Scented Candles to Keep Flies Away: Duration of Repellency
Taking into account the factors mentioned above, scented candles can generally repel flies for several hours.
The duration of repellency can vary from candle to candle, but on average, you can expect scented candles to provide a few hours of fly protection. Additionally, it’s important to note that the effectiveness may gradually decrease as the scent dissipates over time.
To maintain a fly-free environment, it is advisable to relight the candles as needed or replace them with fresh ones to ensure a consistent release of the fly-repellent scent.
