The marshmallow plant (Althaea officinalis) is used medicinally for its soothing mucilage, primarily for respiratory issues like dry coughs, sore throats, and laryngitis, and for digestive complaints such as stomach ulcers and inflammation. Topically, it helps soothe skin irritations, wounds, burns, and insect bites, while internally it can act as a diuretic and help with urinary tract inflammation, with uses spanning from ancient Egypt through medieval Europe to modern herbalism.  
 
Marshmallow plants thrive in full sun and consistently moist, fertile soil with good drainage, mimicking their natural marshy habitats in USDA Zones 3–9, though they tolerate various soils and pH levels; adequate water is crucial, but avoid soggy roots or standing water, with mulching helping retain moisture and establish plants, requiring minimal fertilizer but good spacing as they grow vigorously