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.