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 (3 feet) in height. Mixes will with: Basil, Bergamot, Cedarwood, Eucalyptus, Geranium, Lavender, Lemon, Lime, Oregano, Pennyroyal, Pine, Rosemary, Orange, and Tea tree. Safety Information: Do not use while pregnant. It may be a possible irritant to the skin for sensitive types.