SILL-fee-um Audio
Silphium perfoliatum

These perennials are native to prairies and open woods of Canada and the central and eastern U.S. They have daisy-like, yellow blossoms and resinous sap that is harshly scented. Their height makes them suited to the back of a border, native garden, or naturalistic plantings.

Noteworthy CharacteristicsThese tall native plants offer perennial, sunfloweresque blossoms to gardens and wilder settings.

CareGrow in moist, neutral to slightly alkaline soil (preferably heavy soil) in full sun to partial shade.

PropagationSow seed in containers when fresh; divide in spring.

ProblemsRust, downy mildew, Cercospora leaf spot.

Species and cultivars

More From the Plant Guide

Winter Interest

Partial Shade

Browse the Full Plant Guide