Also known as Boneset · Hemp Eupatorium · Hemp Thoroughwort
Hemp agrimony (Eupatorium cannabinum) is a tall perennial herb with showy clusters of pinkish-purple flowers, attracting pollinators. Native to Europe and Asia, it thrive
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun to Partial Shade
75% intensity
Thrives in full sun but tolerates partial shade, especially in hotter climates.
Consistent Moisture
50% intensity
Prefers moist soil, water when top layer is dry. Avoid waterlogging.
Clay, Loam, Sandy, Acidic, Neutral, Alkaline
50% intensity
Hardy
25% intensity
Tolerant of a wide range of temperatures, hardy in USDA zones 4-8.
Low Feed
25% intensity
Not a heavy feeder. Light feeding in spring if soil is poor.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
Contains pyrrolizidine alkaloids, which can cause liver damage if ingested by humans or animals.
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Hemp agrimony prefers consistently moist soil, especially during establishment and dry periods. Water deeply when the top few centimeters of soil feel dry. Avoid waterlogging, as this can lead to root rot.
In very hot weather, it may require more frequent watering.
Cut back the dead stems in late winter or early spring before new growth emerges. Deadheading spent flowers in autumn can encourage a tidier appearance and may prevent self-seeding if this is undesirable.
Pruning can also rejuvenate older plants.
Hemp agrimony can be propagated by division of clumps in spring or autumn. Sow seeds in autumn or early spring, either outdoors in a seedbed or indoors. Root cuttings can also be taken in early summer.
Repotting is typically only necessary for container-grown plants. If the plant becomes root-bound, repot it into a slightly larger container in spring.
Ensure the new pot has adequate drainage holes to prevent water accumulation around the roots.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Hemp Agrimony (Eupatorium cannabinum)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Eupatorium |
| Species | Eupatorium cannabinum |
Similar in genus Eupatorium
Answers based on plant encyclopedia data
