Sweet Flag is in a family all by itself. Sweet Flag is grown for its many qualities such as their textured foliage. Sweet Flag makes a beautiful addition to water gardens or used as borders. Sweet Flag is a Perennial plant and it offers a nice, sweet fragrance. It is perfect to grow in containers and is very low maintenance. If you have any issues with deer Sweet Flag is deer resistant and makes an excellent groundcover. Sweet Flag is known to have many beneficial qualities and has been known to help with heartburn when used properly. Vapors from the roots can even repel certain insects.