← Bedfellow

Whorled Rosinweed

Silphium trifoliatum

Whorls of three leaves around square stems; loose panicles of yellow daisies for weeks. More refined than cup plant (*S. perfoliatum*) — doesn't flop in good gardens.

Family

Asteraceae

Type

wildflower

Lifespan

perennial

Height

3–7 ft

Spacing

1–3 ft apart

Light

sun, part shade

Soil moisture

dry, moist

Soil pH

acidic, neutral, alkaline

Bloom

July, August, September

Bloom colors

yellow

Wildlife value

pollinators, butterflies, songbirds

Landscape uses

border

Native states

AL, DC, GA, IN, KY, LA, MD, MI, MS, NC, NY, OH, PA, SC, TN, VA, WV