Cup Plant

Botanical Name: Silphium perfoliatum

En français: Silphie perfoliée

Cup plant, Silphium perfoliatum, is a beautiful native Ontario plant. Its large stature, (6 to 9 feet tall), and wide, tapered leaves are further complemented by an abundance of open yellow flowers. The flowers will re-bloom well into the autumn.

A large plant that needs lots of space. Some gardeners find it to be an effective backdrop for other perennials. Adapts well to prairies, wildflower/native plant gardens, naturalized areas or moist, open woodland areas including stream/ edges.

Blooms:

Width: Up to 90 cm

Water: Dry to Moist

Pollinators:

Native to Eastern Canada

Best Soil: Loam

Its natural habitat: Prairies and meadows.

Caring for Cup Plant

Easily grown in average, medium to wet soils in full sun; tolerates some drought once established. Somewhat slow to establish when grown from seed. Self-seeds in optimum growing conditions.

Companion plant suggestions include Try it with Aster, Hibiscus, Monarda fistulosa or Panicum virgatum

References:

https://www.evergreen.ca/blog/entry/native-plants-we-love-cup-plant/


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