Citronella oil is extracted from a resilient grass (Cymbopogon nardus) native to Sri Lanka and Java. It is a very aromatic perennial that grows approximately 1 meter in height. Citronella oil's most useful quality is that of it being an insect repellent. It is best used in a spray, a diffuser or on a cotton ball amongst linen. It is also useful in ridding cats and dogs of fleas.
