Hypericum ascryon
Common name: Great St. Johns Wort
Hypericum ascyron (considered by many to be synonymous with Hypericum pyramidatum) is native to streambanks and moist wooded slopes from Maine to Manitoba south to Maryland, Indiana and Kansas. Great or also known as Giant St. Johns Wort has large attractive flowers and foliage. Although, the blooming period is relatively short. Giant St. John's Wort is easy to identify because of its large size and the presence of 5 styles on its flowers and seed capsules. Other large Hypericum spp. are usually woody, rather than herbaceous, and they usually have only 1-3 styles.
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Plant Details
Plant type
Shrubs
Soil type
Mesic (Not too Wet Not too Dry), Moist Mesic, Wet
Light exposure
Full Sun, Partial Sun / Part Shade
Bloom period
Summer
Urban environment
Yards that Flood
Habitat
Floodplain, Moist Woods, Wetlands
Growth form
Dence Growth Form, Shrubby/Clump
Growth rate
Moderate
Flower color
Yellow
Fall color
Yellow
Size
- Mature height
- 4 Feet
- Mature width
- 2 Feet
- Max height
- 6 Feet
- Max width
- 3 Feet
Additional information
Butterfly host plant Pollinator hot spot