Shrubby St. John’s Wort (Hypericum prolificum) is a structural plant with yellow blooms in summer. They prefer mesic soil in sun to part sun but can tolerate shade. They grow up to 5 feet tall and are a good choice for slopes. Companion plants include Bradbury’s Bee Balm (Monarda bradburiana) and Prairie Alumroot (Heuchera richardsonii).
Maintenance
Root rot can be a problem in wet soils.
About
Light Requirements
Sun,
Part Sun,
Shade Moisture Requirements
Slopes Soil Requirements
Clay,
Most Soils Height
Medium Spacing
2 to 4 feet Category
Seasonal,
Structural Attracts
Bees Illinois Native Plant Status
Yes Bloom Time
June,
July,
August Bloom Color
Yellow Seasonality
Summer Sociability
Individuals, Groups up to 5