Native Plants for Dry Soils : Silphium trifoliatum- Whorled Rosinweed
Maryland Native Plants for Dry Soils
Silphium trifoliatum – Whorled Rosinweed
Silphium trifoliatum, commonly called Whorled Rosinweed, is a tall perennial wildflower commonly found in a variety of open meadow environments growing three to six feet tall. Defined by its narrow stems, whorled, lance-shaped leaves and profuse, small, yellow flowers which bloom through the late summer months, Whorled Rosinweed’s flowers are attractive to butterflies and a number of important native bees. After flowers begin to turn to seed, the plant is also highly attractive to a number of bird species including Goldfinches.
Rosinweed plants receive their common name from their resinous juices that when hardened, can be chewed like gum. Similar in appearance to many other asters, Whorled Rosinweed is an important pollinator species, as well as a beneficial and versatile substitute for sunflower. Silphium trifoliatum grows well in a variety of open woodland conditions, pollinator gardens, or open meadows.
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Common Name: Whorled Rosinweed
Type: Herbaceous perennial
Family: Asteraceae
Height: 3.00 to 7.00 feet
Spread: 1.00 to 3.00 feet
Bloom Time: July to September
Bloom Description: Yellow
Sun: Full sun to part shade
Water: Dry to medium
Maintenance: Low
Suggested Use: Woodland Garden, Naturalize
Flower: Showy
Tolerate: Deer
Information from Unity Church Hill Nursery and Ernst Seeds
Whorled Rosinweed Buds
Whorled Rosinweed Leaves and Stems