Lemon Verbena is significantly different than Lemon Balm. Lemon Verbena is a native to South America where Lemon Balm comes from Europe. Lemon Verbena requires full sun, where Lemon Balm likes partial shade. Lemon Verbena is a shrub and can grow as large as 10 feet. It is ideal for container growing as it cannot survive below 0˚ F.