Lemongrass Oil — Complete Essential Oil Guide | Blueberry Botanicals

Lemongrass Essential Oil — Complete Guide

Lemongrass essential oil is one of the most recognisable and widely used oils in aromatherapy, natural cosmetics, and tropical perfumery. Its bright, citrusy-green aroma is instantly uplifting, and its broad-spectrum applications — from insect repellent to luxury spa blends — make it a cornerstone of any essential oil collection.

Botanical Profile

Property Detail
Botanical Name Cymbopogon citratus (West Indian) / Cymbopogon flexuosus (East Indian / Kerala)
Family Poaceae (Grass family)
Common Names Lemongrass, Fever Grass, Cochin Grass, Malabar Grass, Sera (Kerala)
Plant Part Used Fresh or partially dried leaves and stems
Country of Origin India (Kerala, Tamil Nadu), Guatemala, China, Sri Lanka, Indonesia
CAS Number 8007-02-1 (C. citratus); 89998-14-1 (C. flexuosus)

East Indian vs West Indian Lemongrass

Feature East Indian (C. flexuosus) West Indian (C. citratus)
Origin Kerala, India Guatemala, Sri Lanka
Citral Content 75–85% (higher) 65–80%
Aroma Sharper, more lemony, slightly grassy Softer, sweeter, more rounded
Preferred Use Perfumery, cosmetics, industrial Aromatherapy, food flavouring
Shelf Life Slightly longer Standard

Kerala lemongrass (C. flexuosus) is considered premium quality for perfumery and cosmetic applications due to its higher citral content.

Aroma Profile

Characteristic Description
Scent Family Citrus, Green, Herbal
Top Notes Bright, sharp lemon, fresh green, slightly grassy
Heart Notes Warm citrus, herbal, slightly earthy
Base Notes Mild, slightly sweet, fades quickly
Intensity Strong — use sparingly in blends
Longevity Short to medium — top note that fades within 1–2 hours
Blends Well With Vetiver, Cedarwood, Lavender, Geranium, Bergamot, Ginger, Basil, Rosemary, Patchouli

Extraction Method

Lemongrass essential oil is produced by steam distillation of the fresh or partially dried leaves and stems. The process is efficient, yielding a pale yellow to amber oil with a thin viscosity.

  • Yield: Approximately 0.3–0.5% from fresh plant material
  • Appearance: Pale yellow to amber, mobile liquid
  • Viscosity: Low
  • Key Constituent: Citral (geranial + neral) — 65–85%

Traditional Uses

In Kerala & South Indian Tradition

  • Known as Sera in Malayalam — used in traditional cooking and herbal preparations
  • Lemongrass tea (Sera chaya) — a traditional digestive and cooling drink
  • Used in traditional steam baths and herbal fumigation
  • Applied as a natural insect repellent in homes and farms
  • Incorporated into traditional hair rinses for scalp freshness

In Ayurvedic Context

  • Classified as cooling (sheeta) and light (laghu) in Ayurvedic properties
  • Used in Ayurvedic formulations for fever management and digestive support
  • Applied in Panchakarma steam therapy (Swedana) preparations

Aromatherapy Applications

Application Method Benefit
Mood Uplift & Energy Diffuser or personal inhaler Instantly uplifting, combats mental fatigue
Stress Relief Diffuser blend with lavender Balances nervous system, reduces anxiety
Air Purification Diffuser Antimicrobial properties freshen indoor air
Insect Repellent Diluted spray or diffuser Natural citronellal content deters insects
Spa & Relaxation Diffuser or bath blend Creates a tropical spa atmosphere
Headache Relief Diluted temple application Cooling and analgesic properties

Recommended Diffuser Blend — Tropical Spa: 3 drops Lemongrass + 2 drops Vetiver + 2 drops Bergamot + 1 drop Ginger

Cosmetic Applications

Skin Care

  • Oily & Acne-Prone Skin: Astringent and antimicrobial — add 1 drop to clay mask or toner (well diluted)
  • Pore Minimising: Toning properties help tighten pores — use in facial mist at 0.5% dilution
  • Body Scrub: Add 3–5 drops to sugar or salt scrub for a refreshing, brightening treatment
  • Deodorant Formulations: Natural antimicrobial and fresh scent — widely used in natural deodorant sticks and sprays
  • Foot Care: Antifungal properties — add to foot soak or foot cream

Hair Care

  • Scalp freshening: 2 drops in 30ml carrier oil for oily scalp treatment
  • Natural hair fragrance: adds a fresh, citrusy lift to hair oils and serums
  • Dandruff control: antimicrobial properties support scalp health

Natural Insect Repellent

  • Dilute 2–3% in carrier oil or water-based spray for a natural mosquito repellent
  • Blend with Citronella, Eucalyptus, and Peppermint for enhanced efficacy
  • Apply to exposed skin before outdoor activities (always diluted)

Perfumery Applications

  • Role: Top note
  • Function: Adds bright citrus lift, freshness, and tropical character
  • Usage Rate in Fine Fragrance: 0.5–3% (high citral content requires careful dosing for skin safety)
  • Perfumery Families: Fresh Citrus, Aromatic, Tropical, Green, Chypre
  • Classic Pairings: Lemongrass + Vetiver + Cedarwood (earthy tropical), Lemongrass + Bergamot + Lavender (fresh aromatic)
  • IFRA Note: Citral (the primary constituent) has IFRA restrictions for leave-on skin products. Maximum usage levels must be observed in cosmetic formulations.

Dilution Chart

Application Dilution % Drops per 10ml Carrier
Facial serum / sensitive skin 0.5% 1 drop
Body massage oil 1–2% 2–4 drops
Scalp treatment 1–2% 2–4 drops
Insect repellent spray 2–3% 4–6 drops per 10ml
Diffuser Neat 2–3 drops per 100ml water
Bath blend (in carrier) 1–2% 2–4 drops in 15ml carrier

Important: Lemongrass oil is a known skin sensitiser at high concentrations due to its citral content. Always use at the lower end of dilution ranges, especially for leave-on products and sensitive skin.

Safety Precautions

  • ⚠️ Skin sensitiser — use at low dilutions (0.5–2% for leave-on products)
  • ⚠️ Avoid on sensitive or damaged skin
  • ⚠️ Phototoxicity: Not significantly phototoxic, but avoid high concentrations before sun exposure
  • ⚠️ Avoid during pregnancy — consult a healthcare provider
  • ⚠️ Not recommended for children under 2 years
  • ⚠️ Always patch test before first use
  • ⚠️ Not for internal use
  • ⚠️ Keep out of reach of children
  • ⚠️ Store in a cool, dark place away from direct sunlight
  • ✅ IFRA-compliant usage rates must be observed in cosmetic formulations

GCMS Explained — What It Means for Lemongrass Oil Quality

A GCMS report for lemongrass oil confirms species identity, citral content, and purity. Key markers:

  • Primary Constituents: Citral (geranial + neral) — 65–85%, Myrcene 10–20%, Geraniol 2–5%
  • Quality Indicator: Total citral content above 75% indicates high-quality East Indian lemongrass
  • Adulteration Flags: Synthetic citral addition, blending with cheaper citrus oils, incorrect species labelling
  • Species Verification: GCMS can distinguish C. flexuosus from C. citratus by their constituent ratios

Frequently Asked Questions

What is lemongrass essential oil used for?

Lemongrass oil is used for mood uplift and stress relief in aromatherapy, as a natural insect repellent, in skin and hair care for its antimicrobial and toning properties, and as a fresh top note in perfumery and cosmetic formulations.

Is lemongrass oil safe for skin?

Yes, when properly diluted. Lemongrass oil is a potential skin sensitiser due to its high citral content, so it should be used at 0.5–2% dilution for leave-on products. Always patch test first.

What is the difference between lemongrass and lemon essential oil?

Lemongrass oil comes from a tropical grass and has a grassy, herbal lemon aroma. Lemon essential oil is cold-pressed from lemon peel and has a brighter, cleaner citrus scent. They are different oils with different chemical profiles and applications.

Can lemongrass oil repel mosquitoes?

Yes. Lemongrass oil contains citral and citronellal, which have natural insect-repelling properties. Dilute 2–3% in a carrier oil or water-based spray and apply to exposed skin. Reapply every 1–2 hours for continued protection.

What is Kerala lemongrass?

Kerala lemongrass refers to Cymbopogon flexuosus, the East Indian variety grown in Kerala and Tamil Nadu. It has a higher citral content (75–85%) than the West Indian variety and is prized for perfumery and cosmetic applications.

How do I use lemongrass oil in a diffuser?

Add 2–3 drops to 100ml of water in your diffuser. Blend with vetiver, bergamot, or lavender to balance its intensity. Diffuse for 30–60 minutes at a time.

Related Guides

Disclaimer: This guide is for educational purposes only and is not a substitute for professional medical advice. Consult a qualified healthcare provider or Ayurvedic practitioner before using essential oils for therapeutic purposes. Individual results may vary.