At first glance, it doesn’t look like much. Bright green foliage, discreet flowers, compact silhouette… and yet, this plant has a power that very few possess: it naturally repels mosquitoes. Its name? Pelargonium citronella. A cousin of the geranium, but with a little something extra: a powerful lemon scent that mosquitoes flee from like the plague.
And the good news is that April is the perfect time to plant it in the garden, on a balcony, a terrace, or even on a windowsill. With a little care, it will be with you all summer long, spreading a pleasant scent for humans… but totally off-limits for biting insects.
Here is everything you need to know about this summer ally that combines beauty, fragrance and natural protection.
A plant like no other: the scent that repels mosquitoes
Pelargonium citronella is often mistakenly called “citronella geranium”. In fact, it is not one of the perennial geraniums found in our flowerbeds, but belongs to the scented pelargonium family, which are very popular in window boxes.
Its slightly downy and very indented foliage gives off a powerful fragrance as soon as it is brushed against, touched or a draught passes through it. This fragrance, similar to lemongrass but more complex, is due to the presence of natural compounds such as citronellol and geraniol.
These molecules are well known for their mosquito-repellent effect. They disrupt their sense of smell and prevent them from locating their target. The result: with a few plants placed strategically around living areas, the number of bites decreases significantly and naturally.
And unlike chemical sprays or candles, pelargonium citronella does not pollute the air and is not dangerous for children or animals.
An attractive and fragrant addition to the balcony or terrace
In addition to its repellent properties, pelargonium citronella is also a beautiful ornamental plant, perfect for brightening up windowsills, patio pots or hanging planters.
It grows quickly, has dense foliage, and its flowering, although modest, adds a welcome touch of color. Some cultivars develop small purple or pinkish flowers, which contrast nicely with the soft green of the leaves.
But it is above all its ability to perfume the ambient air that is appealing. From the first days of warmth, a simple draft spreads its lemony aroma throughout the space. No need for essential oil or a diffuser: the plant does all the work, for free.
Planted near a lounge chair, a French window or an outdoor dining area, it quickly becomes indispensable.
The right time to plant: now or never
Pelargonium citronella is a sensitive plant, originally from South Africa. It cannot tolerate temperatures below 5°C. This is why you should wait until the frosts have ended before planting it outside.
April is ideal, especially in regions with mild winters. The earlier it is planted, the more time it has to grow before the hot weather arrives. In cooler climates, it can be grown in pots and brought inside on cool nights until mid-May.
Plant in rich, well-drained soil, and always in full sun. The more light it receives, the more essential oils it produces and therefore the more it repels mosquitoes.
Moderate watering is sufficient: it does not like excess water, but it should not be allowed to dry out completely either. Watering once or twice a week, depending on the temperature, is generally sufficient.
In a pot or in the ground: both are possible
Pelargonium citronella particularly likes being in a pot, which makes it a perfect plant for balconies, terraces or windowsills. It is easy to move, to bring in if necessary, and can even be hung to maximize the repellent effect around a table.
In the ground, it can also flourish, provided it has good drainage and a very sunny location. It does not tolerate shade, heavy or waterlogged soil. In these cases, a raised planter can be a good solution.
In both cases, regularly pruning the stems stimulates branching and keeps the plant compact and well-stocked. You can also crumple a leaf from time to time to release its scent, which reinforces its immediate repellent effect.
An ally of choice in a natural mosquito repellent strategy
Pelargonium citronella does not work on its own, but it fits perfectly into a natural approach to mosquito control. Used in addition to other plant repellents (such as lavender, mint or lemon balm), it forms an effective plant barrier.
It can also be combined with simple actions, such as avoiding saucers of stagnant water, installing a bat box nearby, or favoring auxiliary insects that regulate larvae.
But what this plant brings, beyond its effectiveness, is the pleasure of useful gardening, of perfuming your living space, and of reconnecting with simple, natural and environmentally friendly solutions.
