Great St. John’s Wort, named for its large flowers and traditional association with St. John’s Day.
Produces large, bright yellow flowers (2–3 inches wide) with abundant stamens forming a showy cluster.
Spreads slowly by seed and rhizomes, forming clumps over time.
Seeds may be eaten by some birds and small wildlife species.
One of the largest native St. John’s Wort species, making it a striking ornamental for native gardens.
Deer-resistant and low-maintenance once established.
Historically noted for medicinal uses, though not commonly used in modern herbal practice.
Great St. John’s Wort, named for its large flowers and traditional association with St. John’s Day.
Produces large, bright yellow flowers (2–3 inches wide) with abundant stamens forming a showy cluster.
Spreads slowly by seed and rhizomes, forming clumps over time.
Seeds may be eaten by some birds and small wildlife species.
One of the largest native St. John’s Wort species, making it a striking ornamental for native gardens.
Deer-resistant and low-maintenance once established.
Historically noted for medicinal uses, though not commonly used in modern herbal practice.
Bloom: summer
Habitats: meadows; streams; thickets; wet prairies
Lifespan: perennial
Moisture: moist
Plant type (height): forb (2.5 to 6 feet)
Requirements: full sun to partial sun
Soil: rich loam; sandy loam
