Photo by Svdmolen · CC BY-SA 3.0
Hemp-agrimony
Plant·Eupatorium cannabinum
Full sun
Sun
Medium
Water
Moist soil
Drainage
Zones 4–8
Hardiness
Hemp-agrimony (Eupatorium cannabinum) is a plant. It grows best in full sun and has moderate water needs.
Through the year
DormantFloweringDying back
Works well with
from wiki dataNo companions recorded.
WHAT IT NEEDS
Wants full sun
Needs moderate water
Tolerates moist soil, as long as it drains well
Prefers soil pH 5.5–7.5
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Prefers loam, clay soil
Tolerates some soil compaction
Draws up potassium, calcium from deep in the soil
Adds a lot of organic matter to the soil
Partners with mycorrhizal fungi to boost nutrient uptake
WHAT IT GIVES
Gives mulch biomass (medium to high)
Gives nectar (abundant)
Gives pollen (abundant)
Provides potassium
Provides calcium
Attracts pollinators
HOW IT GROWS
SIZE & SPACING
Herbaceous
Height50–150 cm
Spacing45 cm (min 30 cm)
Root depthMedium
Width30–60 cm
Width figures are rough estimates, the most variable measurement in our data.
AI estimate · accuracy improves as growers contribute corrections.
HOW TO PROPAGATE
Propagate by seed, division
Difficulty
Establishes in about 1 yr
Self-seeds readily on its own
Where this comes from
Parsed11 Sept 2026
ConfidenceNot recorded
Photograph Photo by Svdmolen · CC BY-SA 3.0