Quick answer: Lemongrass vs citronella oil comes down to chemistry. Lemongrass oil is mostly citral, which gives it a sharp, fresh lemon smell. Citronella oil is rich in citronellal and geraniol, which smell softer and are better known for keeping mosquitoes away. Both come from Cymbopogon grasses, but they aren't interchangeable. Pick citronella for repellent blends and lemongrass for fresh, clean scents and cleaning products.
Walk into any local market in monsoon and you'll find "lemongrass citronella oil" on the same label. Sometimes the seller insists it's the same thing. Sometimes the bottle smells nothing like either.
Here's the thing. They're cousins, not twins. I work at our facility in Nimbri, Panipat, where we fill and test both oils, and the mix-up is one of the most common things customers write to us about. Put lemongrass in a mosquito roll on and you get a nice smell with weaker protection. Put citronella in a kitchen cleaner and it smells oddly like a hospital. Each has its job.
People compare the two by nose alone. Both smell "lemony", so they must do the same thing. What actually matters is which molecule dominates, because that decides how the oil behaves on skin, in a room and around insects.
What makes lemongrass and citronella oil different?
Start with the plants. Lemongrass oil comes from Cymbopogon flexuosus (East Indian lemongrass, grown widely in Kerala) or Cymbopogon citratus, the one in your Thai curry. Citronella oil comes from Cymbopogon winterianus (Java type) or Cymbopogon nardus (Ceylon type). Same genus. Different species.
You can tell the grasses apart in the field. Citronella has reddish or magenta stem bases. Lemongrass stems stay green all the way down. Citronella also grows taller, with slightly wider leaves. Look at the photo above and the difference is obvious once you know.
Then the chemistry. Lemongrass oil is usually 70 percent or more citral, a blend of two aldehydes called geranial and neral. That's the zesty, almost sherbet-like note. Citronella oil carries citronellal, geraniol and citronellol instead. In a good Java oil, citronellal alone is often above 35 percent. Rounder smell. Slightly floral. And that citronellal is the reason citronella oil gets all the mosquito press.
Which RV Organica oils should you compare side by side?
Citronella Essential Oil
Our citronella essential oil has 4.67 stars from 6 reviews. It smells green, lemony and a bit floral, with a slightly medicinal edge. This is the one for mosquito sprays, roll ons and balcony diffusers.
Lemongrass Essential Oil
The lemongrass essential oil is our better rated of the two, at 4.83 from 6 reviews. Sharper, brighter, cleaner. People love it in a morning diffuser, in floor cleaners and in soaps for oily skin. It's the one that makes a kitchen smell scrubbed.
Lemongrass Hydrosol, the gentle option
Want the scent without the strength? Lemongrass hydrosol is the water left over from distillation, with traces of the oil in it. Rated 4.33 from 3 reviews. It works as a face mist or toner for oily skin, and you don't need to dilute it.
Which is better for mosquitoes, lemongrass or citronella?
Citronella, on balance, but lemongrass isn't useless.
Both oils show repellent effects in lab tests. One set of tests found lemongrass oil gave about 51 percent repellency against Aedes aegypti. Citronella has more research behind it, a longer track record as a registered biopesticide in the US since 1948, and a chemistry that's more directly aimed at the job.
Neither lasts long on skin. Expect one to two hours before you need to reapply. Mixing them is perfectly reasonable, and a 2:1 citronella to lemongrass blend smells fresher than citronella alone while keeping most of its punch. Our citronella oil mosquito repellent guide has tested ratios for roll ons and sprays.
What do the numbers say about lemongrass vs citronella oil?
Here's a side by side in plain words. Lemongrass oil is typically 70 to 85 percent citral. ISO 4718 sets the quality markers for East Indian lemongrass oil. Citronella oil, Java type, needs at least 35 percent citronellal and at least 85 percent total geraniol under Indonesia's SNI 06-3953-1995. ISO 3848 and ISO 3849 cover the Java and Sri Lankan types of citronella.
Safety numbers differ too. Citral is a well known skin sensitiser, and the IFRA (International Fragrance Association) standards put limits on how much citral a finished product can contain. That's why lemongrass oil needs lower skin dilutions than citronella. I keep lemongrass at around 0.5 to 1 percent on skin and citronella at up to 5 percent for a short outdoor evening.
Neither oil is phototoxic, unlike cold pressed lemon or bergamot. So sunlight after use isn't the issue. Concentration is.
When should you reach for lemongrass instead?
Cleaning, mostly. Lemongrass oil's sharp citral note cuts through kitchen smells, bathroom mustiness and that damp monsoon odour in cupboards. Ten drops in a litre of mopping water is plenty. It also suits soaps and face washes aimed at oily skin, at low strength.
Lemongrass is also the better pick for a morning diffuser. It feels awake and bright. Citronella in the morning can feel heavier, more like an evening scent. If you're building a diffuser shelf, our list of the best essential oils for diffuser use is a good next read.
How do brands use both oils together?
Plenty of herbal phenyl, floor cleaner and handwash brands use both. Lemongrass brings the fresh top note people associate with "clean". Citronella brings the repellent story and some body to the scent. A common starting point we see is two parts lemongrass to one part citronella in a cleaner, flipped the other way for a repellent spray.
Consistency matters more than the ratio. Citral and citronellal both vary with crop, so ask for a COA with every batch. Planning a product line? Our manufacturer and bulk supply page covers sampling, MOQs and repeat orders.
Where can you buy lemongrass and citronella oil in India?
Both are in our essential oils collection at rvorganica.com. Orders over ₹999 ship free across India, and first time buyers get a discount with FIRSTORDER at checkout. COA available on request for any batch. Every bottle is filled at our facility in Nimbri, Panipat, Haryana 132104, under our parent company RV International, which holds nine certifications including ISO 22000, FDA, Halal, Kosher, HACCP and MSME. For bulk, mail info@rvorganica.com or call +91 8937003005. New to citronella? Start with our main citronella oil guide.
What do people usually ask about lemongrass and citronella?
Is citronella oil a lemongrass oil?
No. Both come from Cymbopogon grasses, but from different species, and the oils have different main components. Lemongrass oil is mostly citral. Citronella oil is mostly citronellal and geraniol.
Is citronella just lemongrass?
Not quite. They're close relatives. Citronella has red tinged stem bases and grows taller, while lemongrass stays green and is the one used in cooking. Citronella grass isn't meant for the kitchen.
Which is better lemongrass or citronella?
Depends on the job. For mosquito repellent blends, citronella. For cleaning, fresh room scents and oily skin products, lemongrass. For a nice smelling repellent, use both.
Is lemongrass or citronella better for mosquitoes?
Citronella has more research and a longer history as a registered repellent. Lemongrass also repels mosquitoes to a degree. Both need reapplying within a couple of hours.
What is the common name for citronella?
Citronella grass, or simply citronella. The two commercial types are called Java citronella and Ceylon or Sri Lankan citronella. Ceylon oil is also sold as Lenabatu citronella in some markets.
Final Thoughts
Lemongrass vs citronella oil isn't a contest with one winner. They're two tools from the same grass family, and each does one thing especially well. Use citronella when insects are the problem and lemongrass when freshness is. These observations come from working inside a certified manufacturing facility, and the best blends we see always respect that difference instead of pretending it isn't there.
