Just the mention of the words “poison ivy” may have some of you itching already. The Johnson County Extension gardening hotline receives numerous requests for identification and control each summer.

Mason Heberling, associate curator of botany at the Carnegie Museum of Natural History, holds a poison ivy specimen collected in Lehigh County, Pa. in 1840, the oldest used in the study. A new study ...

If you were a Girl Scout or a Boy Scout, you probably heard the adage "leaves of three, let them be" to deter you from getting poison ivy rash. And, while it is true that a poison ivy leaf contains ...

A few years ago I was leading a group of Merrimack College ecology students on a nature walk, when one of them pointed to a vine with five leaflets per leaf, and asked if it was poison ivy. “No,” I ...

Some people are not allergic to poison ivy. Some people are. I'm a person who spends a lot of time outdoors and, as luck would have it, I am very allergic to poison ivy. Who said that life is fair?

Every gardener should know how to get rid of poison ivy when it pops up around the yard. If the sap from this plant comes in contact with your skin, a chemical called urushiol in the sap can cause ...

CHARLOTTESVILLE, Va. (WHSV) - With the warm spring weather, plants are growing, including the poisonous variety such as poison ivy, poison oak and poison sumac. These plants have a substance called ...

It is a great time of the year to be outside watching the leaves turn color a little bit each day even though the fall color season is late this year compared to recent years. Collecting those leaves ...

Poison ivy has a compound leaf made up of 3 leaflets which can be 1 to 4 inches long. The middle leaflet is the only one with a long stalk. Courtesy Johnson County Extension Just the mention of the ...