Are Mullein and Yarrow in the same botanical family?

No — Mullein is Scrophulariaceae and Yarrow is Asteraceae.

Can you substitute Mullein for Yarrow?

They come from different families (Scrophulariaceae and Asteraceae), so direct substitution is uncommon.

Compare · per-herb profile

Mullein vs Yarrow

Verbascum thapsus · Achillea millefolium

Mullein

Verbascum thapsus

T Traditional Use

Family: Scrophulariaceae
Genus: Verbascum
Primary use: medicinal

Verbascum thapsus, the great mullein, greater mullein or common mullein, is a species of mullein native to Europe, northern Africa, and Asia, and introduced in the Americas, Australia and New Zealand.

Yarrow

Achillea millefolium

T Traditional Use

Family: Asteraceae
Genus: Achillea
Primary use: medicinal

Achillea millefolium, commonly known as yarrow or common yarrow, is a flowering plant in the family Asteraceae. Growing to 1 metre tall, it is characterized by small whitish flowers, a tall stem of fernlike leaves, and a pungent odor.

At a glance

· Different families — Scrophulariaceae vs Asteraceae.
· Both are primarily medicinal.
· Evidence tiers — Mullein: T; Yarrow: T.