Silphium terebinthinaceum (Prairie Dock)
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Silphium terebinthinaceum

Prairie Dock

Tall stalks, to 10', carry bright yellow flowers above the broad, coarse foliage that grows about 2' tall in clusters close to the ground. Foliage is spade-shaped with a rough, "cat's tongue" texture typical of Silphiums. Attracts bees and parasitic wasps.

Height: 6-8 ft
Width: 24-36 in
Soil Conditions: Moist/Well Drained
Flower Color: Yellow
Bloom Time: July,August,September
Hardiness Zone: 3 TO 8
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Characteristics & Attributes for Silphium terebinthinaceum

Attracts Wildlife

Attracts Butterflies
Attracts Pollinators
Attracts Wildlife

Critter Resistance

Rabbit Resistant

Plant Habit

Upright

Light Conditions

Sun

Native Plant Community

Dry Prairie
Mesic Prairie
Savanna

Bloom Time

July
August
September

Flower Color

Yellow

Flower Hue

Medium

Flower Height

6' to 8'

Flower Type

Head

Foliage Color

Green

Leaf Texture

Coarse

Prune Time

Jan/Feb/March

Flower Form

Single

Growth Rate

Slow