Known to be toxic - Toxic to mammals if ingested.
Eupatorium altissimum
Tall boneset
Eupatoire élevée
Obsolete Names
- tall thoroughwort
- upland boneset
No seeds available for this plant.
We are not accepting seeds for this plant at the moment.
Bloom colour: White
Bloom period: August - October
Max Height: 4.0 feet
Max Width: 3.0 feet
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
Gardener Experience:
Does not spread uncontrollably
Does not spread uncontrollably
Landscape uses:
Suitable for rock gardens
Suitable for shoreline rehabilitation
Suitable for container garden
Suitable for school gardens
Suitable for rock gardens
Suitable for shoreline rehabilitation
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
Plant Distribution
Native to Ottawa region: No
Thrives in Ecozones
- Ecozone-Mixed Wood Plain
- Ecozone-Boreal_Plains
Butterflies Supported by Eupatorium altissimum
- Carmenta pyralidiformis (Boneset Borer)
- Haploa clymene (Clymene)
- Phragmatobia fuliginosa (Ruby Tiger)
- Schinia trifascia (Three lined flower)
Bees Supported by Eupatorium altissimum
No bee data available for this plant.
Complementary Plants Plants that grow in similar conditions, that bloom at the same time.
- No complementary plants found.
Sowing Information
- Sowing depth: Surface sow
- Sow before February
- Stratification duration: 60 days
- Self-seeding
Harvesting Information
- 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
- On Cultivar: Yes, do not donate unless you know source, and there are no known cultivars in your garden or at proximity