Ever sat outside for chai only to be chased indoors by a swarm of mosquitoes? Many Kenyans are asking if planting lemongrass around the home can offer some relief from these pests.
We’ll look at the science behind lemongrass, how to use it effectively in our local context, and compare it to other common methods to help you make a smart choice for your family.
The Science Behind Lemongrass and Mosquitoes
Lemongrass contains citronella oil, a natural compound that mosquitoes find unpleasant. However, it’s not a force field; the plant itself only repels them from its immediate vicinity. A common misconception is that just having a pot in the corner will clear a whole room—that’s not entirely true, the effectiveness depends on how you use it.
How It Works in a Kenyan Home
Think of it like a slow-release diffuser. Crushing the leaves to release the oil is key. For example, many people in places like Kitengela or the coastal regions plant it near doorways and windows, or rub crushed leaves on their skin before sitting outside in the evening.
The Role of Citronella Concentration
The repellent power depends on the concentration of citronella oil. A single plant has a low concentration. For stronger protection, you need extracted oil in candles, sprays, or lotions, which are often sold in local agrovets or markets like Nairobi’s City Market.
How to Use Lemongrass Effectively in Kenya
To get real results, you need a strategy. Relying on a few decorative plants won’t cut it against our stubborn local mosquitoes, especially during the rainy seasons. You have to be intentional about creating a protective zone.
Here are the most effective methods used in Kenyan households:
- Plant a Perimeter: Plant lemongrass densely around your house’s foundation, near windows, and by outdoor seating areas. This creates a natural barrier.
- Make a Homemade Spray: Boil chopped leaves, let it cool, and strain the water into a spray bottle. Spritz it on curtains, furniture, and even your clothes. Reapply every few hours.
- Use Pure Citronella Oil: For stronger protection, buy 100% citronella oil from a trusted agrovet. You can mix about 10-15 drops with a carrier oil like coconut oil for a skin rub, or add it to a diffuser.
Remember, lemongrass is a supplement, not a replacement. For full protection, especially in high-risk areas, you must still use treated mosquito nets as recommended by the Ministry of Health and clear any stagnant water around your home.
Common Mistakes When Using Lemongrass in Kenya
Expecting a Single Plant to Protect a Whole House
Many people buy one small pot and place it in the living room, expecting magic. The effect is far too weak. Instead, you need multiple plants placed strategically at entry points to create a meaningful barrier.
Not Crushing or Bruising the Leaves
If you just let the plant grow untouched, it releases very little repellent oil. You must regularly crush or bruise the leaves between your fingers to release the citronella scent. That’s what does the work.
Using It as a Complete Replacement for Nets
This is a dangerous mistake. Lemongrass cannot prevent mosquito bites while you sleep like a treated net can. Always use your mosquito net, especially for children and pregnant women, as advised by healthcare workers.
Forgetting About Other Breeding Sites
Even with lemongrass, if you have old tyres, cans, or blocked gutters holding water near your home, you are breeding mosquitoes next door. Clear these sites first; lemongrass is for repelling, not for stopping breeding.
Getting and Growing Lemongrass in Kenya
In Kenya, lemongrass is very accessible and affordable. You can buy a mature plant for between KES 100 and KES 300 at most local nurseries, like those along Ngong Road or at major markets. For a larger supply, farmers’ cooperatives or agro-vets often sell root splits or seedlings at even better prices.
Timing is everything. The best time to plant is at the start of the long rains (usually around March-April) or the short rains (October-November). This gives the plant a strong start with less watering needed from you. It thrives in our climate but needs full sun and well-drained soil.
Here’s a pro tip: instead of just buying plants, ask a neighbour who has a thriving patch for a few root splits or “viable stems.” It’s a common, friendly practice in many estates, and you’ll get a variety already proven to grow well in your local area. Plant them about a meter apart to form a dense, effective hedge.
The Bottom Line
Lemongrass can help repel mosquitoes in your Kenyan home, but it’s a tool, not a total solution. Its effectiveness depends on how you use it—crushing leaves, planting a perimeter, and using it alongside essential measures like mosquito nets and clearing stagnant water.
Why not take a walk around your compound this weekend? Identify those potential mosquito breeding spots and then visit your local nursery to pick up a few lemongrass seedlings to start your natural barrier.
Frequently Asked Questions About Does Lemongrass Repel Mosquitoes in Kenyan Households? in Kenya
How long does it take for planted lemongrass to become effective?
You’ll need some patience. A newly planted seedling takes about 2-3 months to establish and grow bushy enough to be useful. Start crushing the leaves as soon as they are mature to release the scent.
For the best repellent effect, aim for a dense hedge, which might take a full growing season (about 6 months) depending on rainfall and care.
Can I use lemongrass essential oil from the supermarket instead?
Yes, but you must check the label carefully. Look for 100% pure citronella or lemongrass oil, not just a scented fragrance oil. Brands like ‘DoTERRA’ or local ones found in good agrovets are reliable.
Mix about 10-15 drops with a cup of water and a little vinegar in a spray bottle for a quick homemade repellent spray.
Is it safe to use lemongrass on my baby’s skin?
It is not recommended. A baby’s skin is very sensitive. Even natural oils can cause irritation. The safest method for infants is to use a properly tucked-in mosquito net and plant lemongrass outside the windows of their room.
Always consult with your paediatrician or clinic nurse before applying any homemade mixture to a child’s skin.
What if mosquitoes are still biting despite having the plants?
This means your strategy needs strengthening. First, ensure you are crushing the leaves regularly. Second, check for and eliminate any hidden stagnant water sources like clogged gutters or old containers where they breed.
Consider combining lemongrass with other methods, like installing screen nets on windows or using a smokeless mosquito coil in the evening.
Where is the cheapest place to buy many lemongrass seedlings in Kenya?
For bulk buying, skip the fancy nurseries. Go directly to a farmers’ market like Marikiti in Nairobi or to an agricultural training centre in your county. You can also ask at your local chief’s baraza if there are community seedling projects.
You can often get a bundle of 10-20 viable stems or splits for around KES 500, which is much cheaper than buying individual potted plants.
