Herb field guide

What is St. John's Wort (Hypericum perforatum)?

St. John's wort (Hypericum perforatum) has traditionally been harvested on St. John's Eve, or Midsummer. This page covers its history, folklore, and recorded correspondences, not instructions for use.

At a glance

Common name
St. John's Wort
Botanical name
Hypericum perforatum
Family
Hypericaceae
Parts mentioned in historical records
Flowering tops
Traditional correspondences
Sun; Fire
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Historical record

Harvested traditionally on St. John's Eve (Midsummer, June 24). Extensively cited by Dioscorides, Galen, and Paracelsus as the premier wound herb and remedy for melancholy.

Folklore and mythology

Known in old herbals as 'Fuga Daemonum' (Chaser of Devils). Hung over windows, cottage doors, and farmsteads on Midsummer Eve to repel witches, thunderbolts, and demonic apparitions.

Crushed red sap was legendary as the spilled blood of St. John the Baptist upon his beheading; in Norse lore, connected to Baldur the Sun God, representing unconquered solar light at Midsummer solstice.

Midsummer bonfires were part of the same tradition, and the herb was hung above farmstead doors as a demon chaser.

Tradition: Christian Folklore & Norse Associated figures: St. John the Baptist & Baldur

Mystical correspondences

ElementFire
PlanetSun
Common intentionsSolar warding, exorcism of despair, banishing dark spirits, Midsummer fire magic, invincibility

Correspondences vary by tradition and source.

Is st. john's wort safe to use?

Historical and spiritual associations do not establish that St. John's Wort is safe or effective. Do not use this page as instructions for ingesting, smoking, inhaling, or applying St. John's Wort.

For current safety information, check a health authority or ask a qualified clinician or pharmacist, especially during pregnancy or lactation, while taking medication, or with an allergy or health condition.

Exposure note: EPA indoor-particle guidance says burning can add particles and advises ventilation. ASPCA plant entries address ingestion, not smoke exposure. See the sourced burning, pet and pregnancy lookup; neither source clears this plant as safe to burn.

Name reference

  • The RHS profile lists common St. John's wort among the common names for Hypericum perforatum: RHS plant profile.