Silphium perfoliatum

Silphium perfoliatum


Cup Plant Category:


Soil: Hydric (Wet), Mesic (Medium) to Dry Sun: Full, Partial Height: 3′-8′ Color: Yellow Blooms: June-September 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: The Cup plant has long opposite leaves that attach to one another around the square stem. It looks like the stem is growing through the middle one large leaf.

Suggested Uses:

This is a very tall, showy wildflower that can be very aggressive if given too much moisture! Give it room! It is a wildlife attractor extrordinaire!  It attracts birds that enjoy it’s seeds and also attracts hummingbirds and butterflies in mass too!

Interesting Facts

Medicinal Uses: It has been used to treat liver ailments, morning sickness, paralysis, back pain and lung hemorrhages. Native Americans would drink a beverage made from the root as a purification before going on a Buffalo hunt. Food Uses: The leaves can be cooked and eaten. Other Uses: Birds and tree frogs sometimes use the water caught in the cup of the leaves. More Info: Only the petal-like ray flowers produce seeds. Other Names: Carpenter’s weed, cup rosinweed

Please Note: **Not shippable to the State of New York, considered a “regulated and prohibited invasive species**


Additional information

Weight 1 lbs

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