1 named cultivar

‘Elegant Feather’Dogfennel

perennialN. America Native

Dogfennel

The Story

Plant Bio

Eupatorium capillifolium, dogfennel, is an erect native perennial of the eastern United States and eastern Canada, three to six feet high and two to three feet across. Finely divided feathery leaves clothe woody-based stems that smell unpleasant when broken, and small greenish-white flowers open in late summer and autumn.

The foliage is the point rather than the flowers, which are insignificant — it reads as a tall soft green haze and holds attractive fruiting stems into winter. It is a native, but it colonises disturbed ground aggressively enough that NCSU also files it as a weed, so give it a naturalised setting rather than a border. The crushed stems smell strongly.

Uses & Benefits:

A tall soft green haze of feathery foliage, with fruiting stems that hold through winter.

Native, drought-tolerant and untouched by deer or rabbits, on ground where little else establishes.

Pollinators work the late flowers when little else is open.

Essentials

At a Glance

Plant Type

Perennial

Height

60 inches

Width

36 inches

Light

Full Sun

Zones

6, 7, 8, 9, 10

Water

Low to moderate

Humidity

Moderate

Lifespan

Perennial

Native To

Eastern North America

Toxicity

Toxic to livestock

Planting

How to Grow

Plant in full sun or partial shade in any drained soil.
Give it a naturalised setting rather than a border.
Water only while establishing; it takes drought.
Cut stems to the ground in late winter.
Deadhead before seed sets to limit spread.
Keep livestock away from the foliage.

Pro Tip

Cut the flowering stems before seed ripens — this is a native that colonises disturbed ground fast enough to be classed as a weed.

Keep It Thriving

Care Guide

Do

Site it in a naturalised area 🌾
Cut stems down in late winter ✂️
Deadhead before seed sets 🌱
Let it take drought and dry soil 🌵

Don't

Plant it in a tidy border ❌
Let it seed freely ❌
Graze livestock on it ❌

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cutback
Deadhead

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Meadow and naturalised plantingWoodland edge and rain gardenTall soft screening within a native garden

Companion Plants

Goldenrod Little Bluestem Joe Pye Weed New England Aster Switchgrass

Multiply

Propagation Methods

Good to Know

Common Questions

Dogfennel questions

What zones can Dogfennel grow in?

Dogfennel is hardy in USDA Zones 6–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Dogfennel deer resistant?

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

When does Dogfennel bloom?

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

Does Dogfennel need full sun?

Dogfennel does best in full sun (6+ hours).