Althaea Officinalis (Marshmallow Root)
Althaea Officinalis (Marshmallow Root)
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Althaea Officinalis (Marshmallow Root) is a traditional medicinal perennial herb grown for its soothing roots, soft foliage, and delicate pink flowers. Long valued in herbal medicine, it is commonly used in teas and natural preparations to support throat and digestive wellness. Its tall, elegant growth habit also adds ornamental appeal to cottage and apothecary-style gardens.
Marshmallow Root thrives in full sun to part shade in moist, fertile, well-drained soils and performs best with consistent watering. It is ideal for damp garden areas, herb beds, and naturalistic plantings where soil moisture is reliable. In summer, it produces pale pink flowers that attract pollinators, enhancing both biodiversity and visual interest

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Mature height
90–150 cm
Mature width
60–90 cm
Spacing
60–90 cm apart
Evergreen/Deciduous
Herbaceous perennial (dies back in winter)
Foliage
Soft grey-green foliage, pale pink flowers
Flowering Period & Fruit Development/Harvest
Summer
Sun tolerance
Full sun to part shade
Maintenance
Low maintenance; prefers consistent moisture and rich soil
Root System
Deep, fibrous root with fleshy medicinal taproot