Nodding Onion Gardens

Native Plant Nursery

Where Wildflowers Grow

Columbia Station, Ohio, USA


 Silphium perfoliatum - Cup Plant

Ohio Native Plant - Natural Range

Silphium perfoliatum

Visit the USDA Natural Resources Conservation Service website for a map of the natural range of the Cup Plant
Cup Plant growing in a rain garden
Cup Plant growing in a Rain Garden
cup plant seed head
Songbirds love seed from Cup Plants
Seed forming on Silphium perfoliatum
Silphium perfoliatum seed is almost ready to harvest
Seeds Provenance - Silphium perfoliatum - Cup Plant  - Prairie Moon Nursery, Winona, MN 2012 - Nodding Onion Gardens 2013 to present
bee on cup plant
Cup Plant a native perennial sunflower
Cultivation Information - Cup Plant
Height - 3 to 8 ft
Flower Color -  Yellow
Blooms - July - Sept
Sun - Sun

Hardy Zone - 4 to 8

Soil -  Moist to wet
pH - 6.1 to 7.4

Natural Fence - A mature grove of Cup Plants are perfect native plants for "green" privacy fences

Family - Asteraceae

Cup plant beginning to flower
Flower buds forming on Silphium perfoliatum
Wildlife Significance

Water - Perfoliate leaves hold water for a wide variety of wildlife, long-tongued bees, butterflies, and skippers that are especially fond of the Cup Plant’s pollen.

Pollen - Nectar - Wasps, bee flies, and various short-tongued bees  The Chickadees, Goldfinches and I were in constant competition for the seeds.

Seed - Birds - I have noticed Chickadees, Goldfinches on this plant

For more details visit the Illinois Wildflower web site.

Cup Plant seeds
Our Cup Plant Seeds