Hemp Agrimony
Eupatorium cannabinum
Also known as Hemp Thoroughwort
Climate Match for your location
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A tall perennial with hemp-like foliage that produces clusters of small pink to purple flowers in late summer. It thrives in damp habitats and attracts butterflies and other pollinators.
Why grow it
Hemp agrimony fills a niche in wet meadows and streamside plantings where many ornamental perennials struggle, offering reliable late-season color when butterfly activity peaks. Compared to Joe-Pye weed (Eupatorium purpureum), it reaches a more modest height (3-5 feet) and tolerates slightly drier conditions, making it more flexible for gardens with variable moisture. Its extended flowering window (late summer through early fall) complements earlier-blooming wetland species rather than competing with them.
Watch out for
This species self-seeds readily in favorable conditions, so deadheading or monitoring is prudent if you wish to contain it. In very wet or poorly drained sites, stems may require staking or pruning to maintain an upright habit, particularly in sheltered microclimates that encourage lush growth.
Overview
- Form
- Growth Rate
- Size
- Dormancy
- Family
- Asteraceae
Native Range
Europe and western Asia
Seasonality
Bloom Season
Season of Interest
Herb
Soft non-woody plants of the field layer.
Succession Role
Tolerances & Soil
Establishment & Care
- Establishment
- Maintenance
- Propagation
A tall perennial with hemp-like foliage that produces clusters of small pink to purple flowers in late summer. It thrives in damp habitats and attracts butterflies and other pollinators.
Climate Match for your location
See how well Hemp Agrimony grows in your area.
Enter your ZIP code and we'll show you how this plant fits your local climate.
Why grow it
Hemp agrimony fills a niche in wet meadows and streamside plantings where many ornamental perennials struggle, offering reliable late-season color when butterfly activity peaks. Compared to Joe-Pye weed (Eupatorium purpureum), it reaches a more modest height (3-5 feet) and tolerates slightly drier conditions, making it more flexible for gardens with variable moisture. Its extended flowering window (late summer through early fall) complements earlier-blooming wetland species rather than competing with them.
Watch out for
This species self-seeds readily in favorable conditions, so deadheading or monitoring is prudent if you wish to contain it. In very wet or poorly drained sites, stems may require staking or pruning to maintain an upright habit, particularly in sheltered microclimates that encourage lush growth.
Overview
- Form
- Growth Rate
- Size
- Dormancy
- Family
- Asteraceae
Native Range
Europe and western Asia
Seasonality
Bloom Season
Season of Interest
Herb
Soft non-woody plants of the field layer.
Succession Role
Tolerances & Soil
Establishment & Care
- Establishment
- Maintenance
- Propagation
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