Great St. Johnswort

Hypericum ascyron L. - Mangosteen family

Size

Mature Height: Up to around 5.0 feet

Planting Distance: 4.0 feet

Plant Type: Forb/herb

Root Depth: 14 inches

Growth Form: Single Crown

Growth Rate: Moderate

Features

Flower Color: Yellow

Conspicuous Flowers: Yes

Bloom Time: Late Summer

Seasonal Growth: Spring and Summer

Evergreen: No

Fall Colors: No

Conditions

Shade Tolerance: Intolerant

Clay Soil Tolerance: Yes

Sandy Soil Tolerance: No

Drought Tolerance: Low

Flood Tolerance: Medium

Fire Tolerance: High

Salt Tolerance: None

Ecosystem Interactions

Pollinators: Native Bees; Bombus; Beetles, Wasps, Flies

Native Range

  • USA:  Connecticut, Illinois, Indiana, Iowa, Kansas, Maine, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New York, Ohio, Pennsylvania, Vermont, Wisconsin
  • CAN:  Ontario, Québec
Regional Native Status: L48 (N), CAN (N)

State-level native status is based on data available through Plants of the World Online. Regional Native Status comes from the USDA Plants Database. For more detailed native status information, please refer to BONAP.