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I want to be outside this time of year. I have this itch that tells me I need to tackle the gardening tasks I’ve been putting off. I also want to go hiking to enjoy being outside before it gets so hot.

One of the issues that comes up with gardening in our ornamental beds or being in the woods is poison ivy (Toxicodendron radicans). Do you know how to identify poison ivy? I find, through speaking engagements and talking to kids in schools, most folks do not. The easiest part to look at is the leaf and number of leaves. Poison ivy leaflets are all attached by a rachis to one long stem that is attached to a main trunk or branch. Poison ivy will have three leaflets on this one stem. The middle leaflet is typically a bit longer than the outer and attached to the rachis. The outer leaves are typically attached directly to the petiole. Always remember, “Leaves of three, let it be.”

I had a co-worker who was working on a pier over the weekend and looked up poison ivy to identify it. She said, “I know it wasn’t because it had jagged edges and poison ivy is smooth.” This isn’t necessarily a good identifier when it comes to poison ivy. The leaflets can be smooth as described, but they can also be lobed like sassafras or toothed (serrated) like most cherry trees. The leaves can also change color throughout the season. A newly emerged plant will display shiny reddish leaves. Throughout most of the season the leaves will be a shiny green but towards the end they tend to become dull looking. Leaf size is all over the place as well ranging from two to six inches long up. In the fall, the leaflets turn a brilliant red typically after the first frost.

What is the big deal with poison ivy anyway? These plants contain an oil called urushiol that can cause itching, red rash, and blistering. I had a friend in college that was highly allergic to urushiol. We were in several classes together that required field trips to the mountains to identify and learn different species of plants and their culture. Our junior year, he got into poison ivy bad and had to go to the doctor for a shot. Our senior year, we went to the very same place. He was careful, wearing long pants, socks, and boots while we were hiking and exploring. When we got home however, he had developed the same rash and had to go get the same shot even though he had been so cautious. How? He was covered the entire time except when he slept in his sleeping bag. But he had not washed his bag from the year before and became infected from the residue that was still on the inside from the previous year’s trip.

How can you minimize the effects of poison ivy? The first is by knowing what to look for, “Leaves of three, let it be,” is a great start. However, older vines will be growing up the side of a tree not displaying any leaves. In this case, look for the vine to be extremely hairy lending it to another adage, “A hairy vine is no friend of mine.” Poison ivy can also be in a shrub form; look again for the leaves of three.
The second way to minimize is to wear personal protective clothing such as long sleeves, pants, socks with shoes, and/or gloves. However, just as my friend learned, these need to be washed thoroughly before being used again or than can still cause a rash. Wash your hands, clothing, and tools thoroughly to remove the oil. I’ve had good success with using an alcohol-based hand sanitizer after encountering poison ivy plants.

What should you do if you get a rash from poison ivy? Wash and soak in cool water, this will be very soothing to the itch. Use over-the-counter products that contain corticosteroids if you aren’t allergic to them. There are some other soaps that tend to help with affects such as Zanfel or generics that I have personally found helpful although no research-based information is available to my knowledge to verify this claim. If the reaction is severe, contact your primary care professional.

What should you do if you find poison ivy in your landscape? There are many great wildlife benefits to poison ivy. Believe or not, many animals eat the leaves, bees and wasps pollinate the flowers, and birds consume the berries. If it isn’t a direct threat to you or your children, you should leave it alone.

However, if it is in a high-traffic area, you may want to take care of it. A product that contains glyphosate or triclopyr or a combination of the two will work well. In some cases, a follow-up application may be necessary. Always use pesticides according to the label. Removal is also an option albeit a risky one. Make certain to cover up and wash everything completely. Never burn poison ivy after removing it, this may cause a severe reaction from smoke inhalation.

If you are itching to learn more about plant culture or have an issue in your home garden or landscape, send your questions to Gene Fox, Consumer Horticulture Agent with the North Carolina Cooperative Extension Service, or call at (252)946-0111. Extension Master Gardeners are available to answer your questions through our Greenline on Mondays and Wednesdays from 10-12 or through our Facebook page, Beaufort County Master Gardener