Marshmallow Root is native to Asia, but can now be found in temperate climates worldwide. It grows best in salty marshes, fields, and tidal areas. It grows to about seven feet and produces thick roots that are harvested in the fall. In ancient times, the root was used in sweet wine to treat coughs. The root’s sweet properties were once used to make a type of candy called the Marshmallow, the modern interpretation of this ancient candy no longer contains any of this plant. The ancient Romans used the plant in barley soup and considered it a delicacy. It’s name comes from the appearance of the seeds.