Cup Plant (Silphium perfoliatum)

Cup Plant (Silphium perfoliatum)

Goldfinches flock to the seeds of Cup Plant in fall and winter. The leaves connect around the stems to form a cup which collects rainwater and dew even during dry weeks, making it a valuable source of water for birds and butterflies


Sun:    Full Sun, Part Shade
Moisture:    Medium, Medium-Wet
Height:    8 feet
Blooms:    July, Aug, Sept
Color:    Yellow
Spacing:    2-4′
Zones:    4-8
Benefits:    Butterflies, Pollinators, Birds

Design Tips

Cup Plant becomes a huge plant with tons of bushy leaves. It spreads easily by seed and often out-competes other natives–be careful when planting this in gardens.

Companion Plants

Fox Sedge
New England Aster
Big Bluestem