Common Mullein (Verbascum thapsus): Towering Biennial with Fuzzy Leaves

Common Mullein: The Velvet-Leaved Tower of the Wayside

Common mullein (Verbascum thapsus), also known as great mullein, Aaron's rod, or Adam's flannel, is a striking biennial that forms a large basal rosette of woolly, silver-gray leaves in its first year. In the second year, a single, unbranched flower spike shoots up 5–8 feet, densely packed with yellow flowers.

Botanical Profile

Native to Europe and Asia, naturalized worldwide in disturbed soils. The leaves are covered in dense, stellate trichomes giving a felt-like texture. Flowers open sequentially from bottom to top, each lasting a day. Bees and hoverflies are primary pollinators.

Traditional and Modern Uses

• Respiratory herb: Leaves and flowers used in teas, tinctures, and smoking blends for coughs, asthma, bronchitis.
• Ear oil: Infused flowers in olive oil for earaches.
• Dye plant: Flowers yield yellow; leaves yield green/brown.
• Torch plant: Dried spikes dipped in tallow used as torches historically.

Thrives in poor, dry, well-drained soil in full sun. Sow seeds on surface; need light to germinate. Biennial lifecycle; allow some to seed for continuity. Hardy in USDA zones 3–9.