Are St Johns Wort and Valerian in the same botanical family?

No — St Johns Wort is Hypericaceae and Valerian is Caprifoliaceae.

Can you substitute St Johns Wort for Valerian?

They come from different families (Hypericaceae and Caprifoliaceae), so direct substitution is uncommon.

Compare · per-herb profile

St Johns Wort vs Valerian

Hypericum perforatum · Valeriana officinalis

St Johns Wort

Hypericum perforatum

B Some Evidence

Family: Hypericaceae
Genus: Hypericum
Primary use: medicinal

Hypericum perforatum, commonly known as St. John's wort, is a flowering plant in the family Hypericaceae. It is a hairless, perennial herb with woody roots, yellow flowers marked by black glands, and leaves that appear perforated due to translucent glands, producing thousands of …

Valerian

Valeriana officinalis

B Some Evidence

Family: Caprifoliaceae
Genus: Valeriana
Primary use: medicinal

Valerian is an herbaceous perennial flowering plant in the family Caprifoliaceae, native to Europe and southwestern Asia. It is the type species of the genus Valeriana.

At a glance

· Different families — Hypericaceae vs Caprifoliaceae.
· Both are primarily medicinal.
· Evidence tiers — St Johns Wort: B; Valerian: B.