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  • ljmarkson

White Snakeroot - a Dangerously Pretty Native Plant!

Updated: Sep 20, 2021

Native plant pick #6 for September is white snakeroot (ageratina altissima - previously eupatorium rugosum). The name comes from Native American tribes using a root poultice made from snakeroot to treat snake bites.

The name snakeroot has nothing to do with the pretty clusters of tiny white fall flowers!

Plant snakeroot where dogs and young children won’t have access to it is because it is extremely poisonous if eaten. In the 1800s so many people in rural areas died from drinking milk from cows that had grazed on white snakeroot that it was called milk sickness. It infamously killed Abraham Lincoln’s mother when he was a child.


I planted a snakeroot plant in a somewhat protected area next to native tall thimbleweed (anemone virginiana) which is also poisonous. I'm creating a little poison patch where the benefits of both plants are not outweighed by their toxicity. I’ll make sure they won’t spread to areas where dogs might nibble on them or children walking by could mess with them. I haven’t made labels for either and will indicate they are poisonous when I do.

Like snakeroot, tall thimbleweed (Anemone virginiana) is both lovely and toxic. Pollinating insects don't seem to mind, which is one of the main reasons I added it to my yard!

Snakeroot is typically found in woodlands and meadows and grows 2-4 feet tall in partially shady, moist areas. It is adaptable and in my yard is about 2 feet tall and growing perfectly fine in a somewhat dry, fairly shady area near a maple tree. Snakeroot self-seeds and spread through fibrous rhizomes to quickly form colonies. I have just one snakeroot that I planted in the spring, so I’ll have to wait until next year to learn just how assertive it is!

So far snakeroot is playing well with others and has not taken over my yard. The seedhead intertwined with the snakeroot is a cornel-leaved aster (doellingeria infirma), the seedheads of tall thimbleweed (anemone virginiana) are in the lower right corner, and a hearty patch of grass-leaved goldenrod is in the background.

The leaves of snakeroot do not stand out and it is unassuming when not flowering. I forgot I had planted it until I noticed the bright white flowers last week!

The lovely flowers of snakeroot look somewhat like late boneset (eupatorium serotinum) but the leaves and way they attach to the stem do not.

From late summer through fall snakeroot offers pollinators such as native bees, moths, flies and butterflies a nectar source. Even though it is toxic to mammals, there are insects that eat it, and overwintering birds enjoy and spread the seeds.

It looks like insects are not botherd by the toxicity of snakeroot. Most of the leaves on my plant looks like something has been nibbling on them.

So far I haven’t seen too many pollinators on my snakeroot, but it is next to a large colony of grass-leaved goldenrod (euthamia graminifolia) and they seem to be getting all the early fall pollinator love right now!

All you need to do is look at the bright golden pollen basket on the bumble on this this grass-leaved goldenrod (euthamia graminifolia) to see why few native plants can compete with goldenrod!

I have hundreds of varieties of native plants in my yard and continue to add new plants for biodiversity. I'm also trying to learn as much as I can about how each native plant grows intown Atlanta to help ensure success for others who want to create healthier ecosystems by adding native plants to their yard. My initial impression is if I was just starting out, snakeroot is not one of the first native plants I'd add to my yard. Yet in a typical back yard it might be a good plant for erosion control or a challenging wild area where it can spread without people and pets around. I usually encourage all native plants, but this is not one to have if you are any sort of 21st century homesteader!

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mirkadamila
19 hours ago
Rated 5 out of 5 stars.

I had no idea that snakeroot was poisonous! I'm really glad none of our pets ever tried to eat it. We've got one dog and six cats running around the house, so you can imagine how worried I'd be if any of them started nibbling on a plant. dream about snake 1212 meaning

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saracoelhosara
Apr 29

I have volunteer snakeroot in all my flower beds and fills the gaps and keeps weeds down. Then the entire yard is abloom in fall. It was the only thing I could get to grow in a patch where barberry, which is allopathic, had poisoned the soil. Letting it run free there for a season seemed to improve the problem and other things are able to take hold now. But in the fall that patch of snake root is buzzing with so many new kinds of bees I will still keep it a prominent feature. It's alive and fund to watch. It's a remarkably functional plant.


We have a dog who has never shown it any interest. Poisonous plants ar…

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efellowship11
Nov 30, 2023

I have always thought this wild flour was pretty, but was unaware that it was poisonous. I'm putting together a Wildflower garden for Butterflies and pollinators. I was going to put this one in its own corner.

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Lindybowers
Oct 17, 2023

You are being too kind. White snakeroot will devour your place. In seeds, in the rhizones. I'm so tired of arguing with militant, diehard native plant people. You are not allowed to speak the truth about this posionous plant. You cannot say that you pulled a plant out, or that it's been infesting your small garden, taking over your asparagus patch, causing rashes on your hands. It's a nightmare plant.

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