Cupplant
Silphium perfoliatum
Plant Information
Type: Herbaceous perennial
Garden: Pond Garden
Zone: 4, 5, 6, 7, 8
Bloom Time: Jul - Sep
Height: 36-120 inches
Light Requirements: Full sun
Soil Conditions: Average well-drained soil
Flower Color: Yellow
Special Characteristics:
- Silphium terebinthinaceum has huge oval to heart-shaped, dark leaves. It is topped off by sunflower-like flowers with yellow rays and yellow center disks in loose clusters