Cup Plant
Silphium perfoliatum
Wildflower Coming Soon
Cup Plant is a Virginia native wildflower that typically reaches 4-8 ft and blooms in mid summer and fall with yellow flowers. It offers exceptional pollinator value, food or habitat for birds, and important larval-host relationships.
About This Plant
- Sun Exposure
- Full Sun, Part Shade
- Soil Moisture
- Medium
- Height
- 4-8 ft
- Spread
- 2-4 ft
- Bloom Time
- Fall, Mid Summer
- Bloom Color
- Yellow
- Garden Goals
- Attract Hummingbirds, Feed Birds, Help Native Bees, Host Caterpillars, Support Pollinators
- Garden Uses
- Large pollinator garden; meadow; back border; bird garden
- Wildlife Value
- Silphium moth; Giant Eucosma moth; Silphium specialist bees
Cup Plant grows best in full sun or part shade with medium soil. At maturity, it is typically 4-8 ft tall and 2-4 ft wide. Its flowers, foliage, seeds, or fruit help support hummingbirds, butterflies, native bees, and birds. Notable wildlife value includes: Silphium moth; Giant Eucosma moth; Silphium specialist bees. It is well suited to Large pollinator garden, meadow, back border, bird garden.
Good to know: Cup-like leaves hold water; large plant for spacious sites.