Silphium terebinthinaceum (Prairie Dock)

POTTED PLANT

$3.95
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SKU:
SITER-SM
MAXIMUM HEIGHT:
8 feet
FLOWER COLOR:
Yellow
BLOOM PERIOD:
5 Summer, fall
SUNLIGHT PREFERENCE:
Full sun to light shade
MOISTURE:
Dry, average
FORMAL LANDSCAPING:
4-Star
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Despite its common name, prairie dock tends to prefer more glade-like habitat here in Missouri. This is a long-lived plant with large, spade-shaped leaves and yellow flowers. Bees visit for nectar and can be found nesting in and around prairie dock plants. Like the closely-related compass plant, the leaf surfaces face east and west. Feel the leaves on a hot, sunny day and they will feel like cool sandpaper. This is because of the tufts of tiny hairs covering the leaf surface that trap a layer of air.

Uses:  Bees, birds, butterflies
Bloom time:  July - October
 
Height:  24 to 36 inches
Space:  18 to 30 inches
 
Sun:  Full sun to light shade
Moisture:  Dry to average
 
Seed:  Harvest September/October. We've germinated the seed without any pre-treatment, but we usually give it 6 to 8 weeks of cold moist stratification. The following seeding rates should deposit about 10 seeds per square foot.
  • 1/8 ounce per packet
  • 1,060 seeds per ounce
  • 1 ounce per 100 square feet

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