What Is Citronella Grass: Does Citronella Grass Repel Mosquitoes

Image by Mokkie

By Darcy Larum, Landscape Designer

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.

What is Citronella Grass?

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. Other herbal uses of citronella grass plant include:

  • relieving migraines, tension and depression
  • fever reducer
  • muscle relaxer or antispasmodic
  • anti-bacterial, anti-microbial, anti-inflammatory, and anti-fungal
  • oil from the plant is used in many cleaning products

Though citronella grass may sometimes be called lemongrass, they are two different plants. Lemongrass and citronella grass are closely related and can look and smell very similar. However, citronella grass has reddish colored pseudostems, while lemongrass is all green. The oils can be used similarly, though they are not exactly the same.

Does Citronella Grass Repel Mosquitoes?

The oils in citronella grass plant is what repels mosquitoes. However, the plant does not release the oils when it is just growing in a spot. For the mosquito repelling oils to be useful, they need to be extracted, or you can simply crush or press the grass blades and rub them directly on clothes or skin. Be sure to test a small area of your skin for an allergic reaction first.

As a companion plant in the garden, citronella grass can deter whitefliesand other pests that are confused by its strong lemony scent.

When growing citronella grass, place it in a location where it can receive bright but filtered sunlight. It can scorch or wilt in areas with too much intense sun. Citronella grass prefers moist, loamy soil.

It has high watering needs, so if grown in a container, water it every day. Citronella grass can be divided in spring. This is also a good time to give it an annual dose of nitrogen rich fertilizer.

Print This Article
This article was last updated on
Did you find this helpful?
Share it with your friends!

Additional Help & Information

Didn't find the answer to your question? Ask one of our friendly gardening experts.

Do you know anything about gardening? Help answer someone's gardening question.

Read more articles about Citronella Grass.

Search for more information

Use the search box below to find more gardening information on Gardening Know How: