Hemp agrimony Plant Care

Hemp agrimony (Eupatorium cannabinum) belongs to the Asteraceae family within the Eupatorium genus. Hemp agrimony is native to Europe, Northwestern Africa, Turkey, Syria, Iran, Iraq, Jordan, the Caucasus and Central Asia, and grows in damp to wet habitats, usually in lowlands. Hemp agrimony is also known as Water hemp, Asses's tail, Chone heterophylla.

Hemp agrimony displays an upright, bushy perennial growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Hemp agrimony produces clusters of small, fluffy white or pink flowers.

Leaf size: approximately 6 inches.

Eupatorium cannabinum requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

Hemp agrimony thrives in full sun to partial shade.

Eupatorium cannabinum grows best at temperatures of 60–80°F. Hemp agrimony prefers humidity levels of 40–70%.

Moist, well-draining soil rich in organic matter. Good drainage is essential for Hemp agrimony to prevent waterlogging, which leads to root rot and fungal issues.

Feed Hemp agrimony every 4 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.

Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

Hemp agrimony can be propagated through seeds, division of rootball. Similar propagation techniques also apply to white thoroughwort plant care, which shares the same genus.

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Hemp agrimony is susceptible to aphids, spider mites, powdery mildew. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Hemp agrimony grows outdoors in USDA Zone 5a – 9b. It survives winters down to planting zone 5a. Hemp agrimony is native to Europe, Northwestern Africa, Turkey, Syria, Iran, Iraq, Jordan, the Caucasus and Central Asia, and grows in damp to wet habitats, usually in lowlands.