Boneset, Thoroughwort

Boneset, Thoroughwort

Eupatorium perfoliatum

This upright perennial bears fragrant white flowers in fall.

  • White flowers are produced in fall, providing colour through the bloom season.
  • Upright clump, reaching 1.25 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, well-drained, wet soil.
Size
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Plant Characteristics

Sunlight
Full sun, Partial shade, Shade
Soil Moisture
Well-drained, Moist, Average, Wet
Hardiness Zone
4 – 4
Mature Height (meters)
0.9 – 1.25
Mature Spread (meters)
0.6 – 0.9
Growth Rate
Medium
Flower Colour
White
Foliage Colour
Green
Bloom Time
Fall
Habit
Upright
Deer Resistant
Rabbit Resistant
Pollinator Friendly
Attracts Birds
Ontario Native
Fragrant
Landscape Uses
Rain garden, Accent, Mass planting
Growing & Maintenance Tips
Often late to emerge in the spring, they grow best in an average, medium to wet, well-drained soil, in full sun to partial shade. Very adaptable to most conditions and become drought tolerant once established. In full sun and extended dry periods leaves may scorch. Pinch back stems in June to encourage a more compact, bushy plant. If planted in deep shade, eupatorium will become leggy and require staking. The overall height and width of eupatorium can vary depending on its growing conditions. Spent flowers can be left for winter interest and food for birds.
Notes
Native to Ontario

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