Lemongrass oil repels fleas very well. Lemongrass oil smells terrible to fleas, but to us it smells great!
Mix it with some water and use it to spray on your pet's bedding to repel fleas. So, yes, lemongrass is one of the best things you can do to help prevent fleas and ticks. It's a great choice for use in all methods imaginable for dealing with insects. However, keep in mind that while lemongrass oil repels fleas from your house and from your pets, it does not cause them to die. Still, it's useful to repel any nearby fleas.