Silphium terebinthinaceum - Prairie Dock
Prairie Dock (Silphium terebinthinaceum) is a bold, and long-lived perennial. It is easily distinguishable by its cluster of very large, spade-shaped basal leaves and one or more naked flowering stalks that rise from the base of the plant. The stalks are green or reddish-purple and at the top divide gracefully into a panicle of yellow flowerheads and round green buds. The species name "terebinthinaceum" means "like turpentine," referring to the odor of its stem resin.
Soil Moisture: Moderate, Wet
Sun Exposure: Full Sun
Height: 4' - 9'
Spread: 2' - 4'
Hardiness Zone: 4 - 8
Bloom Color: Yellow
Bloom Time: July, August, September
Attracts: Birds, Pollinators
Returns of standard seed mixes and individual species must be made in the original unopened packaging within 10 days of delivery. If you wish to return live plants, you must do so within 5 days of delivery. Returns of standard mixes, individual species, and live plants are subject to a restocking fee of 25%. Custom seed mixes may not be returned. When returning non-damaged goods, the buyer is responsible for shipping charges, and return shipping may be made by whatever means the buyer selects.
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