Free Shipping on $50+ orders!

Basket

Prairie Dock Seeds

Silphium terebinthinaceum

  • HOW TO GROW
  • FAST FACTS

HOW TO GROW

Sowing: Direct sow in late fall, pressing into the surface of the soil. For spring planting, mix the seeds with moist sand and store in the refrigerator for 60 days before planting. Keep the soil consistently moist until germination.

Growing: Water seedlings occasionally until they become established. Mature plants prefer slightly dry soil and tolerate drought, in addition to growing well in clay or sandy soils. This plant attracts bees, butterflies, and birds.

Harvesting: For cut flowers, choose stems with flowers that have just opened. Strip the foliage that will fall below the water level, and place in water immediately.

Seed Saving: After the flower petals fall from the head, the center cone will begin to develop seed. Remove the seed heads as soon as the stem beneath the cone begins to turn dry and brown. Spread the seed heads out to dry away from direct sunlight, then separate the small seeds from the stems by rubbing them lightly. Store the cleaned seed in a dry, cool place.

FAST FACTS

Common Names: Prairie Rosinweed

Latin Name: Silphium terebinthinaceum

Species Origin: US Native Wildflower

Type: Native Wildflowers

Life Cycle: Perennial

USDA Zones: 4, 5, 6, 7, 8

US Regions: Midwest, Southeast

Seeds per Ounce: 1,600

Stratification: Cold/Wet for 8 Weeks

Germination Ease: Stratify 8 Weeks

Sunlight: Full Sun, Part Sun

Height: 100 Inches

Color: Yellow

Bloom Season: Blooms Late Summer, Blooms Early Fall

Uses: Attracts Pollinators, Attracts Butterflies, Cut Flowers, Deer Resistant

Size Price Quantity
XL Mylar Packet (~15 Seeds) $3.48 -+
1/16 Oz Mylar (1.77g) $7.96 -+
1/4 Oz Mylar (7.09g) $11.20 -+
1 Oz Mylar (~1,600 Seeds) $32.00 Notify Me
1/4 Lb Mylar (113g) $128.00 Notify Me
1 Lb Bulk Bag (454g) $480.00 Notify Me
5 Lb Bulk Bag (2.27kg) $2,160.00 Notify Me
Add to Wishlist

DESCRIPTION

Towering up to 8' in height, these native plants bear large yellow flowers that eventually produce large seeds that are loved by wild songbirds. This perennial is often found in native wildflower seed mixes because it adds a lot of the third dimension to the planting.
Though slow to establish itself, this prairie giant stands nearly invincible to heat and drought once its taproot has grown deep into the soil. The genus name "Silphium" comes from the Greek word "silphion," the name of a plant with similar properties.

HOW TO GROW

Sowing: Direct sow in late fall, pressing into the surface of the soil. For spring planting, mix the seeds with moist sand and store in the refrigerator for 60 days before planting. Keep the soil consistently moist until germination.

Growing: Water seedlings occasionally until they become established. Mature plants prefer slightly dry soil and tolerate drought, in addition to growing well in clay or sandy soils. This plant attracts bees, butterflies, and birds.

Harvesting: For cut flowers, choose stems with flowers that have just opened. Strip the foliage that will fall below the water level, and place in water immediately.

Seed Saving: After the flower petals fall from the head, the center cone will begin to develop seed. Remove the seed heads as soon as the stem beneath the cone begins to turn dry and brown. Spread the seed heads out to dry away from direct sunlight, then separate the small seeds from the stems by rubbing them lightly. Store the cleaned seed in a dry, cool place.

FAST FACTS

Common Names: Prairie Rosinweed

Latin Name: Silphium terebinthinaceum

Species Origin: US Native Wildflower

Type: Native Wildflowers

Life Cycle: Perennial

USDA Zones: 4, 5, 6, 7, 8

US Regions: Midwest, Southeast

Seeds per Ounce: 1,600

Stratification: Cold/Wet for 8 Weeks

Germination Ease: Stratify 8 Weeks

Sunlight: Full Sun, Part Sun

Height: 100 Inches

Color: Yellow

Bloom Season: Blooms Late Summer, Blooms Early Fall

Uses: Attracts Pollinators, Attracts Butterflies, Cut Flowers, Deer Resistant