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Eupatorium altissimum (Tall thoroughwort)
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1 hour care
per year
per year
1.8m
Max height
Max height
0.9m
Max spread
Max spread
2-5 years
To maturity
To maturity
Plant details
Botanical name
Eupatorium altissimum
Other names
Tall thoroughwort, Tall boneset, Eupatorium saltuense
Genus
Eupatorium Eupatorium
Species
E. altissimum - E. altissimum is an upright, deciduous perennial with elliptic to lance-shaped, toothed, dark green leaves and flat corymbs of star-shaped, white to cream flowers from late summer into autumn.
Eupatorium altissimum is: Deciduous
Habit
Erect
Flower
White in Summer; White in Autumn
Foliage
Dark-green in Spring; Dark-green in Summer; Dark-green in Autumn
How to care
Watch out for
Pests
Generally pest-free.
Diseases
Generally disease-free.
General care
Pruning
Deadhead to prevent unwanted seedlings. Cut back after the first frost.
Propagation
Sow in situ in late autumn.
Propagation methods
Division, Seed
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Where to grow
Eupatorium altissimum (Tall thoroughwort) will reach a height of 1.8m and a spread of 0.9m after 2-5 years.
Suggested uses
Architectural, Beds and borders, Bees (attract & feed bees), Cottage/Informal, Flower Arranging, Prairie planting, Wildlife, Woodland
Cultivation
Grow in well-drained or moist but well-drained soil in full sun or partial shade. Best in afternoon shade in hot summer climates. Tolerates drought. Tends to spread by self-seeding.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Sun
Aspect
South, East, West
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
Companion plants
Botanical name
Eupatorium altissimum
Other names
Tall thoroughwort, Tall boneset, Eupatorium saltuense
Genus
Eupatorium Eupatorium
Species
E. altissimum - E. altissimum is an upright, deciduous perennial with elliptic to lance-shaped, toothed, dark green leaves and flat corymbs of star-shaped, white to cream flowers from late summer into autumn.
Native to
Central United States, Eastern United States
Foliage
Deciduous
Habit
Erect
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Colour
Flower
White in Summer; White in Autumn
Foliage
Dark-green in Spring; Dark-green in Summer; Dark-green in Autumn
How to care
Watch out for
Pests
Generally pest-free.
Diseases
Generally disease-free.
General care
Pruning
Deadhead to prevent unwanted seedlings. Cut back after the first frost.
Propagation
Sow in situ in late autumn.
Propagation methods
Division, Seed
Monthly care advice
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Where to grow
Eupatorium altissimum (Tall thoroughwort) will reach a height of 1.8m and a spread of 0.9m after 2-5 years.
Suggested uses
Architectural, Beds and borders, Bees (attract & feed bees), Cottage/Informal, Flower Arranging, Prairie planting, Wildlife, Woodland
Cultivation
Grow in well-drained or moist but well-drained soil in full sun or partial shade. Best in afternoon shade in hot summer climates. Tolerates drought. Tends to spread by self-seeding.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Sun
Aspect
South, East, West
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
USDA zones
Zone 8, Zone 7, Zone 6, Zone 5, Zone 4
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Chalky, Clay, Loamy, Sandy (will tolerate most soil types) | Tell us... |
| Soil drainage: | Moist but well-drained, Well-drained | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Partial Shade, Full Sun | Tell us... |
| Aspect: | South, East, West | Tell us... |
| Exposure: | Exposed, Sheltered | Tell us... |
| Hardiness: | Hardy (H4) | Tell us... |
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