Silphium Species, Prairie Dock, Prairie Rosinweed

Silphiumterebinthinaceum

Family
Asteraceae (ass-ter-AY-see-ee)
Genus
Silphium (SIL-phee-um)
Species
terebinthinaceum (ter-ee-bin-THIN-uh-see-um)
Synonym
Silphium rumicifolium
Sun Exposure
Full Sun
Foliage
Herbaceous
Height
36-48 in. (90-120 cm)
Spacing
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)
Hardiness
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
Danger
N/A
Bloom Color
Bright Yellow
Bloom Time
Late Spring/Early Summer
Other Details
Category
Perennials
Water Requirements
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
6.6 to 7.5 (neutral)
Patent Information
Non-patented
Propagation Methods
From seed; direct sow outdoors in fall
From seed; stratify if sowing indoors
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored
Regional

This plant is said to grow outdoors in the following regions:

Richmond, California

Denver, Colorado

Batavia, Illinois

Champaign, Illinois

Glen Ellyn, Illinois

Hanna City, Illinois

Hinsdale, Illinois

Mapleton, Illinois

Peoria, Illinois

Springfield, Illinois

Waterman, Illinois

New Carlisle, Indiana

Ann Arbor, Michigan

Springfield, Missouri

Appleton, Wisconsin

Westfield, Wisconsin

show all

Featured Videos

Gardener's Notes:

6
positives
0
neutral
0
negative
Sort By:
Sort By:
R
Downingtown, PA | February 2014 | positive

It is a major flowering forb of the Midwestern USA prairie and American meadow. The sunflower-like blooms are good for pollinators and th...Read More

P
Jerome, IL | August 2011 | positive

Prairie dock is a very attractive plant. The leaves themselves are a delightful novelty, and the yellow flowers attract insects and tower...Read More

B
Irving, TX (Zone 8a) | October 2010 | positive

Awesome Prairie native. It is very tough, and deep rooter to 10' perhaps into the ground. Prairie dock cannot be moved once established...Read More

E
| January 2006 | positive

I have a few of these. I really like them. Quite impressive heights they can attain in that they tower over other species. A friend of mi...Read More

M
M
Tipton, IN (Zone 5a) | July 2003 | positive

I have three of these in one of my beds though they haven't matured to the point of flowering yet. Hopefully I will see it this year. I ...Read More

T
Mapleton, IL | July 2003 | positive

Gorgeous, roadside plant in rural Central Illinois. Has large heart shaped, serrate-edged leaves. App. 2" wide daisy-like yellow flowers ...Read More

Featured
Slender Gumleaf Grasshopper
(Goniaea vocans)
Bell Miner
(Manorina melanophrys)
Featured
Slender Gumleaf Grasshopper
(Goniaea vocans)
Bell Miner
(Manorina melanophrys)