A lemony oil, extracted from fresh or dried or part-dried whole grass by steam distillation. Citronella essential oil smells powerful, similar to fresh lemons with a slightly green, herbaceous undertone. Citronella is renowned for being refreshing, active and penetrating. It is commonly used as an insect repellent. Citronella essential oil blends well with lemon, bergamot, orange, cedarwood and geranium.