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Silphium perfoliatum

Family Compositae
Plant Type herbaceous perennial
Zone USDA:   3a - 9b   RHS:   H - FH   EGF:   H1 - H5   Australia:   1 - 3  
Care Level low, easy, suitable for beginners.
Height 1.2 - 2.4 m (4 - 8 ft)
Spread 30 - 90 cm (1 - 3 ft)
Light full sun
Soil Moisture average to moist, well-drained
Soil Type clay to sandy
Soil pH acidic to alkaline

Description The herbaceous perennial Silphium perfoliatum (cup plant) bears showy and bright yellow blossoms during mid summer to early fall. The foliage is deep green in colour. A specimen plant, Silphium perfoliatum (cup plant) can help you create a focal point in your garden design.
Typical Uses Accent, border, cut flowers, specimen and wild flower.
Special Characteristics Birds and butterflies are attracted to Silphium perfoliatum .