Lesser Snakeroot
Ageratina aromatica
Last reviewed: August 2026

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 areaBrowse plants for this ecoregion
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.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
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
Not sure where to start? Take the 2-minute yard quiz