What Is Mullein Leaf? A Look At The Woolly Garden Plant

A tall plant with soft, felt-like leaves

Mullein leaf is the dried leaf of a plant most commonly called great mullein, known to botanists as Verbascum thapsus. If you have ever walked along a gravel road, an old field edge or a sunny roadside verge, you may already have met it without knowing its name. It is a hard plant to forget: the first-year growth is a flat rosette of large, thick, silvery-green leaves that feel like soft felt or flannel.

In its second year the plant sends up a single stout flowering stalk, often reaching several feet in height, topped with a dense stalk of small yellow flowers. The tall stalk is why people have given it nicknames over the centuries, including candlewick plant and Aaron's rod.

This article is a straightforward botanical explainer. It describes what mullein leaf is, where it grows, and how it appears on a label such as the one on LungFresh, where it is the first plant named in the botanical blend.

Where mullein grows

Great mullein is native to Europe and parts of Asia. It has since spread widely and is now found across North America, where it has become a familiar presence in open, disturbed ground. It does well in poor, well-drained soil and full sun, and its seeds can remain in the ground for a long time before sprouting.

Gardeners sometimes grow it on purpose as an architectural plant. Its silvery rosettes make a striking contrast with greener garden neighbors, and the flower stalks bring height to a border. Other gardeners regard it as a volunteer that arrives uninvited and stays.

Because it is a biennial, meaning it completes its life cycle over two years, you will often find first-year rosettes and second-year stalks growing side by side in the same patch.

• Native range: Europe and parts of Asia
• Now widespread in North America
• Likes full sun and well-drained, poor soil
• Biennial: leaves in year one, flower stalk in year two

The plant parts that appear on labels

Several parts of the mullein plant have appeared in herbal traditions: the leaves, the flowers and sometimes the root. The leaf is the part named in the LungFresh botanical blend, so a label reading Mullein Leaf refers specifically to the dried leaf and not to the flowers or other parts.

That kind of precision is useful. Plant labels often give the part used because different parts of a plant can have very different characteristics. A leaf, a root, a bark and a flower bud are separate materials, even when they come from the same species.

Dried mullein leaf is generally gathered, dried and then processed, for example into a powder or an extract, before it goes into a finished product.

How the name is written on a label

On a Supplement Facts panel, a botanical ingredient often appears under its common name, sometimes with the Latin name in brackets. For mullein, you might notice Mullein Leaf, Mullein Leaf Extract, or Mullein (Verbascum thapsus) Leaf. All of these refer to the same plant.

The word extract tells you that the leaf has been processed to concentrate certain components, usually with water or another solvent, and then dried. Without that word, an entry may refer to the leaf in its powdered form. Some labels also show an extract ratio, such as 4:1, which describes how much raw plant material went into the extract.

In the LungFresh botanical blend, the plants are listed together: Mullein Leaf, Pineapple Stem, Maritime Pine Bark, Stinging Nettle Root, Tiger Milk Mushroom, Quercetin and Black Pepper Fruit Extract. A blend is shown with a combined amount, and the ingredients inside it are typically listed in descending order by amount.

• Mullein Leaf: the part of the plant is stated
• Verbascum thapsus: the Latin name, sometimes in brackets
• Extract: a processed, concentrated form of the plant
• Blend: several ingredients shown with one combined amount

Reading a botanical blend

Botanical blends are a common way to present several plant ingredients in a single line. The panel shows the combined amount of the blend, and then lists each component by name. The order tells you which ingredient makes up the most of the blend by amount, and which makes up the least.

For anyone new to reading these panels, it is helpful to remember that the blend line is not a promise about any single plant. It is a description of what is inside, in the same way an ingredient list on a loaf of bread names each element.

Mullein sits first in the LungFresh blend, which suggests that, according to the usual labeling convention, it is the largest component by amount among the named plants. The panel on the bottle holds the exact figures for the full product.

A few practical points

LungFresh is a daily dietary supplement in capsule form for adults. The brand suggests two capsules each day with a glass of water, around six to eight ounces, or as the label directs, and a bottle of 60 capsules makes a 30-day supply. It should be stored in a cool, dry place.

You can buy it as a one-time purchase in two, three or six bottle packs, with orders shipping in 24 to 48 hours and delivery typically taking three to ten business days. A 60-day money-back guarantee applies.

If you enjoy plants, mullein is a pleasant one to get to know simply as a plant. It is easy to identify, easy to grow and has a long history in gardens and meadows. When you find its name on a label, you now know exactly what it is: the leaf of a tall, woolly roadside plant.