Most gardeners have heard of the wise advice “leaves of three, let it be” referring to the pest plant poison ivy. While not quite as catchy, the saying really should be “leaflets of three, let it be.” ...

Poison ivy leaves are what we call compound leaves. Each leaf has 3 leaflets, hence the adage. Rosie Lerner, retired Purdue consumer horticulture specialist, wrote that another key identifying ...

It’s not just poison ivy leaves that harbor urushiol. Stems, roots, and even smoke from burning poison ivy can cause a reaction, at any time of year, Keegan said.

Each leaf has 3 leaflets, hence the adage, “Leaves of three, let it be.” Another key identifying characteristic of poison ivy is that one side of a leaflet may have an irregularly toothed margin, ...

I noticed dead spots on my ivy leaves this summer. What is this, and what can I do to help my plants? — Paul Morgan, Park Ridge There are two common types of leaf diseases on English ivy foun… ...

Poison ivy was found to have high variation across America. However, a small but noticeable uptick in leaf serration was discovered in samples taken from further west.

ray:o s it is not just three leaves. what should i look for,he tn? em:ma poison ivy does have these three leaves, but the middle leaflet has a slightly longer stand, this little stem that attaches it.

If you make contact with poison ivy, oak or sumac, McMahen recommends washing your skin with soap as soon as possible. Wash your clothes and anything else that was in touch with the leaves, too.