4605 Olive Street
Saint Louis, Missouri 63108

314 · 454 · 6868

Silphium terebinthinaceum

Prairie Dock

Masses of 2" bright-yellow flowers on tall strong upright stems. Large 24" rounded basil leaves.

Growing & Maintenance Tips
Medium to dry soil, in full sun to partial shade. Glades, rocky prairies, roadsides, usually on limestone, naturalizing areas.

Interesting Information
Silphium, ancient name of a resinous plant, chosen by Linnaeus; terebinthinaceum, Greek, "with terpentine", referring to the rosin, which gives the species a pleasant scent. A spectacular long-lived plant.

Plant Type Perennial		Bloom Color Golden Yellow		Foliage Color Smooth Green
Height 9-10 Feet		Spread 28-32 Inches
USDA Hardiness Zone 4-8		Patented No

Amsonia ciliata var. filifolia (Thread-leaf Blue Star )	Salvia azurea (Blue Sage )
Amorpha canescens (Leadplant )

Characteristics & Attributes

Bloom Color • Yellow	Landscape Interest • Hummingbird • Butterfly	Exposure • Sun-Part Shade	Soil Moisture Preference • Med-Dry
Missouri Native • Missouri Native	Wildlife/Disease Resistance • Rabbit Resistant • Deer Resistant	Season of Interest (Flowering) • July • August	Attributes • Rock Garden • Drought Tolerant