Citronella candles are one of the most popular outdoor candle choices in the UK, particularly during summer. But do they actually work as insect repellents, and are they worth buying? Here is an honest look at the evidence.
What is citronella?
Citronella is a natural oil derived from certain species of lemongrass. It has a fresh, citrusy, slightly grassy scent and has been used as an insect repellent for over a century. The oil works by masking the scents that attract insects, particularly mosquitoes, making it harder for them to locate a human host.
Do citronella candles actually repel insects?
The honest answer is: somewhat, in the right conditions. Research suggests that citronella candles can reduce mosquito activity in the immediate vicinity of the candle, but the effect is limited and depends heavily on conditions:
- Wind: Any breeze disperses the citronella scent quickly, significantly reducing its effectiveness. Citronella candles work best in still, sheltered conditions.
- Proximity: The repellent effect is strongest within about one metre of the candle. Beyond that, the concentration of citronella in the air drops rapidly.
- Concentration: The amount of citronella oil in a candle varies significantly between products. Higher concentrations are more effective.
Citronella candles are not a substitute for topical insect repellent if you are in a high-mosquito environment. But as part of an outdoor setting, they can meaningfully reduce insect activity and create a more pleasant atmosphere.
Beyond insect repellent: citronella as a scent
Regardless of their repellent properties, citronella candles have a genuinely pleasant, fresh scent that works well outdoors. The bright, citrusy fragrance is uplifting and summery, and a citronella candle on a garden table or patio adds both atmosphere and fragrance to an outdoor evening.
Choosing a citronella candle
Look for candles with a high citronella oil concentration for maximum repellent effect. For outdoor use, choose a candle in a sturdy vessel that will not tip over in a breeze, and always place it on a stable, heat-resistant surface away from anything flammable.
Safety outdoors
Never leave a candle burning unattended outdoors. Wind can cause the flame to flicker unpredictably, and outdoor surfaces are often less stable than indoor ones. Extinguish candles before going inside.
Looking for outdoor candles? Browse our Citronella collection or explore our full range of Scented Soy Candles. All hand-poured in Carlisle, Cumbria.