Hypericum pyramidatum - Great St. John's Wort

 Sun Exposure: Sun, Part Sun

Soil Moisture: Medium-Wet, Medium

Soil Type: Sand-Loam, Loam, Loam-Clay

Height: 3 - 6 feet

Spread: 3 - 4 feet

Blooms: July, August

Root: Rhizome

Habitat: Wet Prairies and Meadows, Woodland Openings Wetlands, Pond edges, River banks

Landscape uses: Pollinator gardens, Naturalized areas, Pond edges, Herbaceous hedge

Complimentary Plants: Swamp Milkweed, Culvers Root

Wildlife Value: The flowers are pollinated primarily by bumblebees, which collect pollen. Host Plant: Grey Hairstreak Butterfly, Black Arches Moth, Grey Half Spot Moth 

Seed Origin: Ontario

Germination Code: C(60), D

Hypericum pyramidatum - Great St. John's Wort

  • Great St. John’s Wort is a robust perrenial with large delicate flowers that blooms in the heat of summer. Blooming is profuse if planted in the right conditions - as this plant likes moist soil. Bumblebees love the pollen of the bright yellow flowers!