Why You Need Lemon Balm In Your Garden. There are many uses for lemon balm. It's a mosquito repellent, you can use it as a rinse aid in your laundry, make tea with it, use it for aromatherapy, make soap or conditioner with it, and much, much more. Click link for more information. Lemon Balm is a Perennial. Plant lemon balm in a pot as it will spread (and take over your garden).