Cymbopogon nardus, common name citronella grass, is a perennial aromatic plant from the Poaceae grass family, originating in tropical Asia.
True citronella plants, Cymbopogon nardus or Cymbopogon winterianus, are grasses. If you are purchasing a “citronella plant” that has lacy foliage instead of grass blades, it is probably a citronella scented geranium, which is often sold as mosquito repelling plants but actually ineffective at repelling these insects.

Citronella grass is a clump forming perennial grass in zones 10-12, but many gardeners in northern climates grow it as an annual. Citronella grass can be a dramatic addition to containers, but it can grow 5-6 feet tall and 3-4 feet wide.
Citronella grass plant is native to tropical areas of Asia. It is grown commercially in Indonesia, Java, Burma, India and Sri Lanka for use in insect repellents, soaps and candles. In Indonesia, it is also grown as a popular food spice. In addition to its mosquito repelling properties, the plant is also used to treat lice and other parasites, like intestinal worms.
Many people grow citronella plants on or near their patios as mosquito repellents. Oftentimes, plants that are sold as “citronella plants” aren’t true citronella plants or Cymbopogon. They are, instead, citronella scented geraniums, or other plants that simply have a citronella-like scent. These citronella scented plants don’t actually have the same oils that repel mosquitoes. So while they may be pretty and nice smelling, they’re not effective in doing what they were probably purchased to do – repel mosquitos. In this article, learn about growing citronella grass and using citronella grass vs. lemongrass or other citronella scented plants.

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