Silphium perfoliatum

Silphium perfoliatum


Cup Plant Category:


Please Note: **Invasive outside of its native range. Shipping this plant to the state of New York is prohibited**

Key Information:

Soil: Mesic (Medium)
Sun: Full Sun – Part Sun
Height: 3-8 feet
Bloom Color: Yellow
Bloom Season: June – September

More Details:

Suggested Uses: Cup Plant is a very tall, showy wildflower with distinctive cup-like leaves and numerous big yellow flowers.  It is great species for large gardens or prairie restorations. They have very deep roots and grow well in both heavy clay soils and sandy soils. A great option for erosion control.  It is native to southern prairies and can be aggressive outside of its native range.

Native Range: Native to the prairies of the Midwest, including southern Minnesota.

Pollinators: Bees and butterflies. Host plant for the Silphium Moth (Tabenna silphiella). High-value nectar source for adult monarch butterflies. Birds enjoy the seeds.

Flowers: Each 3″-4″ flower head has 24-30 petal-like ray flowers and greenish yellow disk flowers. There are 10-30 flower heads per plant.

Leaves: Long, opposite leaves that attach to one another around the square stem, forming a bowl. The stem looks as though it is growing through the middle of one big leaf. Birds and tree frogs sometimes use the water caught in the cup of the leaves.

Other Names: Carpenter’s weed, cup rosinweed

More information: USDA plant profile

Additional information

Weight 2 lbs

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