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Lesser Snakeroot

Ageratina aromatica

Last reviewed: August 2026

Lesser Snakeroot (Ageratina aromatica)
Photo: Alex Abair / Wikimedia Commons (CC BY 4.0)

Toxicity unknown

Lesser Snakeroot (Ageratina aromatica) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

Light

part sun

Water

medium

Size

12"–36" H × 6"–18" W

Bloom

Jul, Aug, Sep

Native to

AL, CT, DE, FL and 16 more states

Pollinators

bees, butterflies, beetles

Before you buy

Your city may pay you to plant this

Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 452 programs across 44 states, each with a link to the provider and the date we last checked it.

Find rebates in your area

Lesser snakeroot is a medium-sized native perennial that produces clusters of small white flowers from summer through early fall. This plant thrives in partial sun with moderate water needs and goes dormant in winter.

In an HOA neighborhood

Lesser Snakeroot is an HOA-friendly choice. Maintenance level: low. Tidiness: 3 out of 5.

Works well in: front yard, foundation, street edge, mid zone.

  • Dies back completely in winter leaving bare spots

Wildlife value

The summer blooms attract bees, butterflies, and beetles, providing nectar during the late growing season. This native plant supports local pollinator populations when many other flowers have finished blooming.

Common questions

How much sun does Lesser Snakeroot need?
Lesser Snakeroot grows best in part sun conditions.
When does Lesser Snakeroot bloom?
Lesser Snakeroot blooms in July, August, and September.
Where is Lesser Snakeroot native?
Lesser Snakeroot (Ageratina aromatica) is native to AL, CT, DE, FL and 16 more states, per vouchered herbarium specimen records and regional native plant society lists.
What pollinators does Lesser Snakeroot attract?
Lesser Snakeroot draws bees, butterflies, and beetles.
Is Lesser Snakeroot HOA-friendly?
Lesser Snakeroot is generally an HOA-friendly choice in the right placement, with low maintenance.

Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

If something looks wrong

Common plant problems, and what to check first

These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.

See all plant problem guides

Ready to grow Lesser Snakeroot? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

Planning a bed around it? Start a free plan with this plant

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