by Winding Pathways | Sep 30, 2021 | Garden/Yard, Nature, Pests
Poison ivy is a universally disliked and feared plant. It seems to grow everywhere. Encounter it and risk an itchy rash…..or worse. Some people are so sensitive to the oil on the leaf’s surface that they end up hospitalized.
Despite the discomfort it causes, poison ivy is an amazing native plant. It’s tough and thrives in any soil type, in drought or deluges. It loves living in the woods, at the edge of lawns and ballfields, and even in city vacant lots. It grows along ocean beaches and up mountains.
Scratching people may disagree, but there are two things to love about poison ivy. Both happen in the fall.
Keep your distance from this beguiling, colorful plant.
As days become cooler and daylight shortens poison ivy is one of the first plants to turn color. A month before sugar maples color up poison ivy leaves turn a glorious deep red. By late fall birds enjoy eating plentiful poison ivy berries. Apparently, they don’t get the itch and happily spread the common plant’s seeds when they poop them out.
There is one certain way to prevent a poison ivy itch. Enjoy it from a distance. Only contact with the plant’s oil can cause a rash. This can happen by touching the plant leaves or vines, patting an animal that has run through a poison ivy patch, accidentally touching clothes that have rubbed by poison ivy, or by breathing smoke with the oils in it when an area is being burned has poison ivy in it.
by Winding Pathways | Jun 28, 2018 | Nature, Pests, Trees/Shrubs
Poison Ivy loves edges
This summer millions of Americans will have unhappy encounters with poison ivy. For most people, the result is a patch of itchy bumpy skin that goes away after a few days to a week or so. Unfortunate others will develop a serious reaction that includes severe itching and swelling.
The very best way to not get a case of poison ivy is to avoid the plant and its culprit – urushiol, an oil that causes the allergic reaction. It’s on the plant’s leaves, in the vines and the sap.
Avoiding urushiol is a surefire way of avoiding a poison ivy rash, but many people have trouble identifying the plant. Fortunately, poison ivy has a secret. Knowing it helps people avoid the plant.
Poison ivy is an amazingly adaptable, hardy and confusing plant. It can be a low growing ankle high sprig, a shoulder high shrub, or a vine winding up to the top of a tall tree. The old saying “Leaves of three, let them be” is only partially helpful in identifying the plant. Usually, it does have leaves in groups of three but many animals love dining on poison ivy and are immune to its ill effects. So, a rabbit or deer may have eaten a leaf, giving the plant leaves of two! And many nonpoisonous plants have leaves of three.
Enter the plant’s secret. Poison ivy is a plant of the edge. It’s rare in the middle of a sun-soaked prairie or in a deeply shaded forest. The plant almost always hugs the edge of a habitat, especially if it gets partial sunshine.
Birds drop seeds when they perch on campground posts.
We’ve seen poison ivy on the edges of:
- Lawns, including ours
- The ocean sand dunes
- Lakes, especially along trails
- Roads
- Trails anywhere
- Ballfields – the rough where balls sometimes go
- Picnic areas
- It especially seems to love life in state park campgrounds especially around the posts that mark a site number and the trees that shade a campground area and that kids love to hug!
So, to avoid poison ivy be especially cautious on the edge. Look carefully at edge plants and study photos of poison ivy in books and on the Internet. Avoid poison ivy when you can.
But, if you accidentally touch the plant or have been wading through likely habitat, get home soon, remove clothes carefully, avoiding touching the outsides of clothes where poison ivy sap may have touched, take a sudsy shower, toss the towels in the laundry, and odds are good that the oil will be soaped off before it creates an allergic reaction.
by Winding Pathways | Aug 19, 2014 | Flowers/Grasses, Nature
These beneficial wildlife plants are the bane of unsuspecting gardeners.
Few plants cause as much human misery as poison ivy. Direct contact with the allergenic oil on its leaves or in its roots or stems can cause itchy welts in people.
Poison ivy is as tricky as it is common. Most outdoor people know to avoid it when it’s growing rapidly in spring but forget about it the rest of the year. We’ve gotten a poison ivy rash in nearly every month and most commonly get a good case in late spring when we’re working in the yard and garden. The plant is sappy then and when we’ve inadvertently pulled the roots out of the ground without wearing gloves we’ve gotten rashes. But late summer into fall are also prime times to get poison ivy rash. Birds eat the seeds which they drop in excrement and the new plants take hold in summer’s lushness. Gardeners encounter the new plants during deep-season weeding or fall “tuck-in” time.
Poison ivy is common in urban and rural areas. It is highly adaptable, preferring light shade, but also thriving in full sun and dense shade. Usually it hugs the ground, but it can grow to a shrub six feet tall or a vine that climbs to the top of trees. It likes to hide inside the greenery of urban hedges. Poison ivy usually has three leaves and is often confused with five-leafed Virginia creeper.
Humans must come in physical contact with the plant or its oil (urushiol) to end up itching. Inhaling smoke laced with poison ivy is asking for trouble. People generally contract poison ivy from tools, pets, farm animals and clothes that have contacted the plant. Any season is game. The Centers for Disease Control and Prevention has an excellent page on range of the plant and its cousin poison oak as well as poison sumac, symptoms, prevention, and care of tools that have been used in extricating poison ivy. Avoiding contact is the best way to prevent a rash. If bare skin comes in contact with the plant immediately wash the area with plenty of soap and warm water.
Despite the misery it causes humans, poison ivy is valuable to wildlife. Deer and cottontails readily eat it, especially in the winter. Birds devour the seeds helping to spread it around in their droppings. Birds like to perch on small end branches of trees so, we’ve learned to look up and assess the likelihood of contacting poison ivy shoots before plunging into a weedy flower bed.
The plant has another merit. Its leaves are one of the first to turn color in early fall, often to a brilliant red. Spot a patch of bright red leaves close to the ground in September and chances are they are either poison ivy or nonpoisonous smooth sumac.
by Winding Pathways | Jul 3, 2025 | (Sub)Urban Homesteading, Flowers/Grasses, Foraging, Garden/Yard, Pests
A Variation on “The Four Horsemen”
A quartet of deadly and toxic plants lurks along trails and riverbanks in Iowa and some across much of the world. They are Poison Hemlock, Poison Ivy, Flowering Spurge, and Wild Four O’clock.
Poison Hemlock
We’ll start with Poison Hemlock. Socrates wasn’t the only person killed by it. The Greeks once used to execute criminals.
Poison hemlock isn’t related to the majestic hemlock tree. Rather, it’s a biennial herbaceous plant. In its second year it quickly shoots up to tower upwards of eight feet tall. In Iowa it prefers living in dappled sunlight where the soil is moist. That describes the land bisected by public trails paralleling rivers and streams—places where people go to recreate.
It’s deadly poisonous, but only when ingested. Walking or cycling by it creates no problem at all. But it’s wise to know about this potentially deadly plant. All parts of it are toxic to people and animals when ingested. Even dried, wintery stems are poisonous.
By early June, the tall green plants with feathery leaves begin bearing white clusters of flowers. Their prettiness is deadly.
Poison hemlock could be confused with Queen Anne’s Lace that’s sometimes called wild carrot. Poison hemlock also often lives near wild parsnips. This plant is also toxic, in a different way. It can create a vicious rash in people who rub against it with bare skin and then are exposed to sunlight.
Where Poison Hemlock Originated
Poison Hemlock is native to Europe and is especially common around the Mediterranean Sea. It was introduced to the Americas, New Zealand, Australia, and Asia, so today, it is a toxic invasive species worldwide.
The Internet and YouTube are loaded with sites describing this plant. A good quick read comes from the National Park Service at nps.gov/articles/poison-hemlock.htm.
Other Troublesome Plants
Unfortunately, several other deadly and toxic plants often live in the same places as poison hemlock. Here are a few.
- Poison ivy often lines trails. It prefers living on the edge of woodlands where it gets some shade and sun. Unlike poison hemlock, poison ivy is a native plant that causes a contact reaction. That means if human skin brushes against it a nasty itchy rash can follow. And, if a pet wanders through the poison ivy and then comes inside where a human pats it, guess what? The irritating oils are transferred and the human gets a nasty rash. A friend of our discovered this earlier this year. Also, state parks are notorious for having poison ivy growing where people contact it – along unkempt trails and winding up trees in campgrounds even. Rabbits and deer eat it and birds eat and spread the seeds.
-
-
Birds drop seeds when they perch on campground posts.
-
-
Poison Ivy loves edges
-
-
Keep your distance from this beguiling, colorful plant.
Pretty and irritating
Flowering spurge is also common along trails. Cut the plant and get some of its sap on skin and a nasty welt is likely to result.
Unattended areas attract undesirable plants.
Wild Four O’clock also loves trail edges and is reported to be toxic.
None of these plants cause problems unless they are eaten or contact the skin. They won’t cause a problem for anyone just walking by
Be careful. Keep your distance.
by Winding Pathways | Jun 19, 2025 | (Sub)Urban Homesteading, Flowers/Grasses, Garden/Yard, Garden/Yard
Years ago, anyone attempting to create a diverse, native landscape in their yard sometimes experienced weed ordinance woes. Their local ‘weed commissioner” would order them to mow their “messy” yard.
Towns created ordinances to give them the authority to force landowners to remove what was perceived to be health or safety hazards. But, they were sometimes used to enforce conformity to the standard of neatly mowed, sprayed, monoculture lawns promoted by lawn product and care companies.
Cities do need the authority to deal with situations where landowners simply neglect their yards by not mowing, but they should not be able to use ordinances to enforce an aesthetic standard.
Changing Times – Responding to Declining Pollinator Populations
These days, homeowners everywhere recognize the importance of diversity. They are creating diverse landscapes of native plants even in tiny yards. Towns are responding by altering restrictive ordinances to allow the restoration of beautiful vegetation that supports beneficial wildlife, including pollinators.
Anyone who plans to diversify their yard in a way that makes it look different from their neighbors’ runs a risk of running afoul of their local town’s ordinance.
Guidelines To Reduce Neighbor or Municipal Friction.
- Research your town’s weed ordinance. Often, it’s printed on the town’s website.
- Develop a written plan and diagram of what the yard will become. It doesn’t need to be fancy or detailed.
- Cultivate and educate neighbors. Even towns that have old-fashioned ordinances rarely go out of their way to enforce them. Enforcement is triggered by complaints, usually from neighbors. Sharing a yard’s plan with neighbors before the change takes place may help them understand that what you are doing isn’t neglect.
- Start small. Maybe just replace a corner of a yard with prairie the first year and expand it gradually as the years go by.
- Make the yard look tended and not neglected. This can mean mowing pathways through tall grass, maintaining some lawns, and often being seen tending the yard tending the landscape.
- Avoid health or safety hazards. Avoid planting taller vegetation that will block a driver’s vision at intersections. Don’t allow allergens like poison ivy or ragweed to grow.
- Hiring a knowledgeable professional yard care company to plan and implement diversity.
Results
Restoring a gorgeous landscape of native vegetation is a delightful project that makes our world a bit healthier. Doing so is easier if it doesn’t irritate neighbors or invoke a stern town ordinance.
-
-
Native and cultivated plants brighten a front yard.
-
-
Families outside
-
-
Converting a yard to more natural plants brings joy.
This first appeared on the Sustainable Landscape Solutions Website at sustainable landscape solutions.org. The company is based in Iowa City, Iowa, and helps landowners create wondrous yards.
