Silphium terebinthinaceum aka Prairie Dock

Taxonomy ID: 12343

Silphium terebinthinaceum, commonly known as prairie dock or prairie rosinweed, is a tall herbaceous perennial belonging to the Asteraceae family, which also includes sunflowers. Native to central and eastern North America, this plant is characterized by its large, oblong to heart-shaped leaves that form a basal rosette. It can grow up to 4m in height and blooms with masses of yellow, daisy-like flowers from mid-summer to mid-autumn. One of the reasons it acquired the name "rosinweed" is because when injured, resin flows from the plant, emitting a sweet fragrance. In Native American culture, the roots of prairie dock are used to brew medicinal tea with various applications. Additionally, the smoke from this plant has been employed as a treatment for congestion and rheumatism. Prairie dock is a native wildflower that thrives in dry to moist loamy well-drained soils. Its vibrant yellow sunflower-like flowers, which bloom from July to September, are pollinated by native bees. These bees also utilize the plant for nesting materials, sometimes even nesting beneath it. Silphium terebinthinaceum is a remarkable and versatile plant that contributes to the ecological health of its surroundings while offering medicinal and aromatic benefits.

Common names

Prairie Dock, Basal Leaf Rosinweed, Dock Rosinweed

More information about Prairie Dock

How difficult is it to take care of Prairie Dock

Prairie Dock is a low-maintenance plant that requires minimal attention, making it an excellent choice for beginners.

What is the region of origin of Prairie Dock

Prairie Dock’s native range is Eastern N. America - Ontario to Tennessee, Ohio and Indiana.

What are the water needs for Prairie Dock

Prairie Dock should be watered regularly, allowing the soil to dry out between waterings.

What is the right soil for Prairie Dock

Prairie Dock loves a well-draining soil. Perlite and vermiculite help with drainage, while coco coir adds organic matter, so a good potting soil mix will have all three. You can improve store-bought soil by adding some perlite to it.

What is the sunlight requirement for Prairie Dock

To ensure optimal growth, the Prairie Dock prefers bright diffused light for 6-8 hours each day. Insufficient light can result in slow growth and leaf drop, so it's important to find a well-lit location for this plant. Place it near a window, within a distance of 1 meter (3 feet), to enhance its potential for thriving.

How to fertilize Prairie Dock

The Prairie Dock should be repotted either when it doubles in size or annually, whichever comes first. Providing new potting soil with all the vital nutrients annually is enough to support the growth of the plant, and thus, there is no need for fertilizer. Remember that plants derive their energy from the sun, not fertilizer.

Is Prairie Dock toxic to humans/pets?

Ploi's records do not contain confirmed information on the toxicity of this particular plant. In the event of accidental ingestion of plant material with questionable toxicity by you, a family member, or a pet, it is always a good idea to consult a healthcare professional.

What is the growth pattern of Prairie Dock

New growth will sprout from the top of the plant as it grows upwards.

More info:
Wikipedia