Silphium perfoliatum

Common name: Cup Plant

Native plant

Cup Plant is a tall prairie plant that produces panicles of large yellow flowers at the tips of its central stalk.  Blooming period occurs early to mid summer and lasts a month to a month and a half.  Its opposite leaves join together along the central stalk forming little cups that catch water.  Birds are drawn the water source as well as the food source provided by its large seeds.  Under ideal growing conditions, this plant will reseed readily and can become somewhat weedy.


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Plant Details

Plant type


Soil type

Mesic (Not too Wet Not too Dry), Moist Mesic

Light exposure

Full Sun

Bloom period


Urban environment

Road-side/Salt Tolerant


Prairie Grasslands

Growth form

Shrubby/Clump, Colonizing / Spreading

Growth rate


Flower color


Fall color



Mature height
3 Feet
Mature width
2 Feet
Max height
8 Feet
Max width
4 Feet

Additional information

Butterfly host plant Loved by birds Pollinator hot spot

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