Silphium terebinthinaceum Prairie Dock Prairie Rosinweed Seed & Plants
(SILL-fee-um  ter-ee-bin-THIN-uh-see-um)
  
Easyliving Native Perennial Wildflowers
Native Wild Flower Seed for Home Landscaping & Prairie Restoration

Prairie Dock Photo by cj

Habitat Bloom Period Color Height Inches Moisture Plant Spacing Lifespan
Silphium terebinthinaceum picture, prairie dock picture Sun to 
Lt Shade
August & September Yellow 48-96 Average to Moist 12 to 36 Inches Perennial

   For other flowers visit the wildflower seed list , to order- copy the orderform or
 email questions, comments, and orders to john@easywildflowers.com  
 

Silphium terebinthinaceum seed
Prairie Dock seed

approximate
number of seeds

approximate coverage
in square feet

1 packet -  $2.50

 50

20 sq ft

1 ounce -   $15.00

 1,000

140 sq ft

1 pound -   $150.00

 16,000

2,240 sq ft

Seed shipping chart at bottom of page
Silphium terebinthinaceum, prairie dock or Prairie Rosinweed, is a striking and conspicuous element of the prairie and glade landscapes.  Silphium terebinthinaceum has tall six to eight foot, leafless stalks with open branched clusters of three-inch yellow flowers.  Prairie dock's huge heart-shaped basal leaves form a rosette at the base of the plant making a very attractive addition to the wildflower garden and are beautiful in dried arrangements.  Prairie Dock plants prefer rich average to moist soil in full sun or light shade.  This plant is a long-lived, drought-resistant perennial and its seeds are a food source for chickadees, sparrows and finches.

The large rough leaves of Silphium terebinthinaceum provide contrasting form and texture when planted with prairie grasses like little bluestem or Prairie Dropseed and showy native wildflowers like New England Aster, Sweet Black-eyed Susan, Royal catchfly, blazing star, Prairie Coneflower, Purple Coneflower, Blue Sage, Culver's Root, Purple Meadow Rue, False Sunflower, and Showy Goldenrod).

Silphium terebinthinaceum seed germination is improved after a pretreatment of 3 to 4  weeks of cold moist stratification or when planted outside in the fall or early winter.

Native Prairie Dock wildflowers occur naturally on prairies, glades, and bald knobs from Ontario and Wisconsin south to Georgia and Louisiana and can be planted over most of the US.  Asteraceae (Aster Family)

The map below shows areas where native Prairie Dock plants grow wild, it is hardy over a much wider area and will grow over most of the USA.  Plant in USDA plant hardiness zones 3 to 9.

Silphium terebinthinaceum
Prairie Dock - Prairie Rosinweed

Alabama
Arkansas
Georgia
Illinois
Indiana 
Iowa

Kentucky
Michigan
Mississippi
Missouri
North Carolina
Ohio

South Carolina
Tennessee
Virginia 
West Virginia
Wisconsin

State Distributional Map for Silphium terebinthinaceum, prairie dock wild flower seed

Use the chart below for shipping charges on flower seeds, to order copy the order form or email questions, comments & orders to john@easywildflowers.com 

Please contact us by email with your address for shipping charges & availability on  potted plants

We accept payment by check, money order, and through Paypal

The minimum seed order amount is $10, this can be a combination of different seeds.

subtotal for flower seeds 

shipping charge for seeds

seed orders up to  $20.00    =    $3.00 shipping
$20.01 - $50.00    =    $4.00 shipping
$50.01-$100.00    =    $5.00 shipping

over $100.00    =    5 % of subtotal

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Easyliving Wildflowers
PO Box  522
Willow Springs,  Mo.  65793
phone-fax 417-469-2611 
john@easywildflowers.com 

Silphium terebinthinaceum, prairie dock or Prairie Rosinweed Plant distribution map complements of USDA, NRCS. 2001. The PLANTS Database, Version 3.1
  (http://plants.usda.gov). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.