Compass Plant (Silphium laciniatum)

Compass Plant (Silphium laciniatum)

Compass Plant is one of the most iconic prairie species in North America. Its towering height, deeply cut foliage, and bright yellow, sunflower-like blooms give it a dramatic presence in any planting. The basal leaves, which can stretch over a foot long and resemble the shape of dandelion or oak leaves, tend to align north-south—hence the name. By mid to late summer, tall flower stalks rise above the foliage, holding dozens of bright yellow blooms spaced along the stem, attracting pollinators from all directions.

In southeastern Wisconsin, Compass Plant thrives in full sun and well-drained soils, especially those with a bit of sand or gravel. It’s deep-rooted and extremely drought-tolerant once established, but slow to mature—often spending its first couple years building roots before reaching full height. This is a species that rewards patience, anchoring a planting with long-term structure, stature, and seasonal movement.

Growing Conditions
Light: Full sun
Soil: Medium to dry soils; prefers deep, well-drained loam or sandy soil 
Height: 6–10 feet
Spread: 2–3 feet
Zones: 4–8
Bloom time: July through September

Wildlife Value
Its blooms are visited by a wide range of native bees, butterflies, beetles, and flies. The plant also supports birds like goldfinches, which feed on the seeds in fall. Its tall stems offer nesting material and perches for insects and birds, and the deep taproot helps improve soil structure over time.

Blooms Alongside:
Blooms Alongside:
Joe-Pye Weed (Eutrochium purpureum), Aromatic Aster (Symphyotrichum oblongifolium), Showy Goldenrod (Solidago speciosa), Wild Senna (Senna hebecarpa), Indian Grass (Sorghastrum nutans), Big Bluestem (Andropogon gerardii), Steeplebush (Spiraea tomentosa)