Silphium perfoliatum

Bright yellow daisy-like flowers
Coarsely-toothed bristly oval green leaves are 20 cm long
Leaves are opposite each other and join together at stem to cup water
Sturdy central stem is hairless and square
Upright, clumping habit
Bloom Time: June to August
Flower Size: 10 cm

ZONE:
4

COLOUR:
Yellow

HEIGHT:
150-250 cm

SPREAD:
75-90 cm

Currently Unavailable

Substitutions Are Available

Growing and Maintenance Tips:

Easily grown in an average garden soil, it is able to withstand heavier, wetter conditions under certain conditions and may drop some of its lower leaves with continued drought.

Additional Notes about Cup Plant:

Native to Ontario

Several native bee species and butterflies feast on the nectar.

Characteristics & Attributes

SOIL MOISTURE:
Moist to Average

FLOWERING TIME:
Summer

HABIT:
Clumping
Upright

FOLIAGE COLOR:
Green

LANDSCAPE USES:
Woodland/woods edge
Naturalizing
Roadside planting

Cup Plant

Silphium perfoliatum

Currently Unavailable

Growing and Maintenance Tips:

Additional Notes about Cup Plant:

Characteristics & Attributes

THESE PLANTS ARE

suitable substitutions for Silphium perfoliatum

Helianthus angustifolius

SWAMP SUNFLOWER

Silphium laciniatum

COMPASS PLANT

Silphium terebinthinaceum

PRAIRIE DOCK