Marshmallow

Marshmallow is a soothing, ancient medicinal plant with a rich cultural history. Growing into tall clumps, it produces beautiful soft flowers and thick mucilaginous roots that have been prized for centuries as a gentle demulcent for coughs, sore throats, and digestive upsets. Its leaves and flowers are also edible and have been used fresh or dried for teas and remedies. Beyond its healing properties, marshmallow is historically significant as the original source of the sweet treat that bears its name, once made by blending its root sap with honey.

Where Can You Grow
Marshmallow thrives in full sun to partial shade and prefers nutrient-rich, damp soils. It can be grown in garden beds, meadows, or near water features, and tolerates clay soils better than most herbs.

History and Historical Uses
Used since ancient Egyptian times, marshmallow root was blended with honey for soothing treats. Greeks and Romans employed it medicinally, while in European folk medicine it became a staple for respiratory and digestive support. Its mucilaginous root extract inspired the marshmallow candies of the 19th century, before sugar and gelatin replaced the plant base.

Canadian Zone Information

• Zones 3-5: Plant in rich, moist soils; mulch well in winter.
• Zones 6-9: Easy perennial growth with minimal winter protection.

How to Grow and Harvest

• Sowing: Direct sow in spring or autumn, or start indoors with cold stratification.
• Spacing: Allow 30-45 cm between plants to accommodate tall growth.
• Care: Keep soil moist for optimal root development.
• Harvest: Roots can be dug in autumn after 2-3 years for highest medicinal potency; leaves and flowers can be harvested annually.

Seed Saving Tips for Future Supply

• Isolation: Marshmallow is largely self-fertile but benefits from insect pollination.
• Collection: Harvest seed pods when they turn brown and dry.
• Storage: Store cleaned seeds in a cool, dry place. Seeds remain viable for about 5 years, sometimes longer under ideal conditions.

Certified Organic By
Islands Organic Producers Association (Cert#1962)