Some people think they have poison ivy because they have a vine growing on some trees or on the ground at home. There are two vines that look a bit similar and are often confused with poison ivy. Do you have either poison ivy or Virginia creeper growing on your property? During the growing season, these plants are easy to tell apart as Virginia Creeper has five-leaflets per leaf and Poison Ivy has three. However, during the winter, distinguishing between the two vines can be more difficult as the leaves have dropped. The reason it is important to be able to tell the difference is that Poison Ivy causes a rash in most people but Virginia Creeper does not. First, let’s cover some facts about Poison Ivy.