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 ...

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 ...

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 ...

Can you give me some advice on poison ivy control — I’m very allergic. I know what it looks like. I need to get some information on how to get rid of it. — Jack Anyone cleaning out overgrown areas or ...

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 ...

I have to admit I have been remiss with respect to some topics. In most cases it was because I wrongly assumed some things were so widespread and common that any column of that type would simply be ...