Known to be toxic - Toxic to mammals if ingested.
Source: Cbaile19
Eupatorium altissimum
Tall Boneset
Eupatoire élevée
Obsolete Names
tall thoroughwort
upland boneset
No seeds available for this plant.
We currently accept seeds for this plant
Bloom colour: White
Bloom period: Aug - Oct
Max Height: 4.0 feet
Max Width: 3.0 feet (spreads by rhizome)
Light condition:
More than 6 hours of direct sun a day
More than 2 or 3 hours but less than 6 hours of direct sun a day
Soil conditions:
Tolerates dry soil condition
Tolerates medium soil condition
More than 6 hours of direct sun a day
More than 2 or 3 hours but less than 6 hours of direct sun a day
Tolerates dry soil condition
Tolerates medium soil condition
Lifespan:
Perennial
plants that will that come back year after year
Gardener Experience:
Does not spread uncontrollably
Self-seeding
Does not spread uncontrollably
Self-seeding
Landscape uses:
Suitable for rock gardens
Suitable for container garden
Suitable for school gardens
Suitable for rock gardens
Suitable for container garden
Suitable for school gardens
Ecological Benefits:
Supports pollinators
Butterfly host
Supports pollinators
Butterfly host
Tolerates:
Deer resistant
Rabbit resistant
Tolerates limestone conditions
Tolerates juglone conditions
Deer resistant
Rabbit resistant
Tolerates limestone conditions
Tolerates juglone conditions
Special Features and Considerations:
This plant is endangered
This plant is endangered
Plant Location
Native to Ottawa region: No
Thrives in Ecozones
- Mixed Wood Plains
Ecological Benefits
Butterflies Supported by Eupatorium altissimum
- Carmenta pyralidiformis (Boneset Borer)
- Haploa clymene (Clymene)
- Phragmatobia fuliginosa (Ruby Tiger)
- Schinia trifascia (Three lined flower)
Specialized Bees Supported by Eupatorium altissimum
No bee data available for this plant.
Plants that grow in similar conditions, that bloom at the same time.
Complementary Plants
- Chamaenerion angustifolium
Fireweed
Épilobe à feuilles étroites - Elymus virginicus
Virginia Wild Rye
Élyme de Virginie - Ratibida pinnata
Grey-headed Prairie Coneflower
Ratibida à feuilles pennées - Sanguisorba canadensis
Canada Burnet
Sanguisorbe du Canada - Vernonia missurica
Missouri Ironweed
Vernonie du Missouri
Substitute For Non-Native Plants
- Thalictrum (Non-Native Meadow Rue)
Sowing Information
Download Sowing Label (PDF)
- Sowing depth: Surface sow
- Sow by February
- Stratification duration: 60 days
- Self-seeding
Harvesting and Seed Sharing
- Harvest start month: July
- Harvesting indicator: Seeds have become fluffy and can be easily removed by shaking on gently pulling off from stem
- Harvesting mean: Shake seed head in paper bag
- Seed viability test: No test needed before donating
- Packaging measure: 1 rounded 1/4 teaspoon
- Seed storage: Air dry in paper bag or open container, for a few days until crisp, shaking seeds to move them once in a while to prevent molding
- At least one cultivar: Yes, do not donate unless you know source, and there are no known cultivars in your garden or at proximity
- No harvesting video available at this time.
Toxicity Notes
Toxic to mammals if ingested.