Prairie Dock

Prairie Dock

Silphium terebinthinaceum

This mounding perennial bears yellow flowers in summer fall.

  • Yellow flowers are produced in summer fall, providing colour through the bloom season.
  • Mounding clump, reaching 2.7 m at maturity; divide every three to four years to maintain vigour.
  • Best in full sun to partial shade to full shade with moist, average, dry, well-drained soil.
Size
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Plant Characteristics

Sunlight
Full sun, Partial shade, Shade
Soil Moisture
Well-drained, Moist, Dry, Average
Drought Tolerant
✓
Hardiness Zone
4 – 4
Mature Height (meters)
1.2 – 2.7
Mature Spread (meters)
0.6 – 1.5
Growth Rate
Slow
Flower Colour
Yellow
Foliage Colour
Green
Bloom Time
SummerFall
Habit
Mounding
Deer Resistant
✓
Rabbit Resistant
✓
Pollinator Friendly
✓
Attracts Birds
✓
Ontario Native
✓
Landscape Uses
Accent, Mass planting, Border
Growing & Maintenance Tips
Tolerant of poor soils, it is easily grown in an average, medium, well-drained soil, in full sun.
Notes
Native to Ontario

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