perennial

Hemp-agrimony

Eupatorium cannabinum

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

48 inches

Width

36 inches

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8

Water

Moderate to high

Humidity

Average to high

Lifespan

Perennial

Native To

Europe, Asia

Toxicity

Toxic if ingested

The Story

Plant Bio

Eupatorium cannabinum, commonly known as Hemp Agrimony, is a perennial herbaceous plant with tall, airy stems topped with clusters of small, pinkish-lavender flowers and deeply divided, serrated foliage. This species is valued for its late summer to autumn flowering display and its ability to attract pollinators such as bees and butterflies, thriving in moist, fertile soils.

Bloom Period:

EarlyLate

Uses & Benefits:

Provides tall, airy flower spikes that attract pollinators and add height to borders.

Drought tolerant and low-maintenance once established, suitable for naturalized areas.

Supports pollinators like bees and butterflies, and attracts birds with seed heads.

Marketplace

Where to Buy

We couldn't find this plant listed online right now.

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Planting

How to Grow

Tuck seeds or divisions into prepared soil in early spring
Water regularly until established, about 6 weeks
Mist cuttings or divide plants in early spring or fall
Mulch around base to retain moisture and suppress weeds
Stake taller varieties for support during heavy blooms
Fertilize in early spring with a balanced fertilizer

Pro Tip

Plant in moist, rich soil for best flowering performance

Keep It Thriving

Care Guide

Do

Water consistently, especially during dry spells 💧
Prune back after flowering to promote bushiness
Mulch to conserve moisture and reduce weeds
Divide every 3-4 years to maintain vigor

Don't

Avoid overwatering in winter ❌
Do not cut back in late fall, wait until early spring
Avoid planting in extremely dry or sandy soils
Refrain from fertilizing with high nitrogen fertilizers

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Pest Check
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Wildflower meadow for vibrant pollinator attractionBack border with tall, airy textureNaturalized area with native planting

Companion Plants

Echinacea Rudbeckia Swamp Milkweed Joe Pye Weed Joe Pye Weed

Multiply

Propagation Methods

Good to Know

Common Questions

Hemp-agrimony questions

What zones can Hemp-agrimony grow in?

Hemp-agrimony is hardy in USDA Zones 5–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Hemp-agrimony deer resistant?

Yes — Hemp-agrimony is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Hemp-agrimony bloom?

Hemp-agrimony typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Hemp-agrimony need full sun?

Hemp-agrimony does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.