Silphium laciniatum

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Common Name: Compass Plant 

Full sun, moderately wet to dry moisture level, prefers a deep loamy soil for its taproot but is adaptable to a wide range of soils including clay, adaptable to a range of pH.  5-9 feet height, blooms summer into fall, yellow flowers.

Germination Code: C(60)

Native Region: Only occurs in 4 counties – Haywood, Carroll, Henry and Montgomery

Designated a “Threatened Species” in Tennessee.  Easy-to-grow plant that is tall, sturdy, rough, and bristly.  Common name comes from the fact that the basal leaves usually orient themselves in a north-south direction in order to minimize intense overhead sun exposure.  Slow to establish and may not flower until second or third year.  Excellent for naturalizing.  Has a large, woody taproot that may go down 15 feet, so division is not possible.  Attracts birds, butterflies and bees.

Compass Plant - Silphium laciniatum 4
Photo Courtesy of Prairie Moon Nursery http://www.prairiemoon.com/
Compass Plant - Silphium laciniatum 7
Photo Courtesy of John Hilty http://www.illinoiswildflowers.info/
Compass Plant - Silphium laciniatum 6
Photo Courtesy of Prairie Moon Nursery http://www.prairiemoon.com/
Compass Plant - Silphium laciniatum 3
Photo Courtesy of Prairie Moon Nursery http://www.prairiemoon.com/
Compass Plant - Silphium laciniatum 1
Photo Courtesy of John Hilty http://www.illinoiswildflowers.info/
Compass Plant - Silphium laciniatum 2
Photo Courtesy of Prairie Moon Nursery http://www.prairiemoon.com/
Compass Plant - Silphium laciniatum
Photo Courtesy of Prairie Moon Nursery http://www.prairiemoon.com/