Poison ivy

Poison ivy is very common in New England. In fact, there might be some of these invasive plants in your yard right now.

Poison ivy varies widely in form from low, freestanding plants to tree-like vines. However, every version has three shiny leaves with serrated edges and pointed leaflets. The central leaflet has a longer stalk, the lateral leaves have almost none.

The allergic reaction is caused by urushiol oil found in all parts of the plant: leaves, roots, and stems. Urushiol oil can remain active on surfaces, including dead plants, for up to five years. Urushiol oil causes allergic reactions in over 85% of people exposed to it. Although some people seem to be immune, immunity levels can change with age. Always assume you are susceptible, even if you have never experienced the rash before.

How do you eradicate poison ivy? Carefully. Cutting, handling, or pulling is dangerous. Stems and roots can hold 10x as much urushiol oil as leaves.

What’s more, ripping out poison ivy just encourages renewed growth. Burning or mowing plants is dangerous too. Smoke and dust can get into your lungs causing systemic reactions. In our experience, herbicides are the most effective remedy. Even so, you often need time and multiple applications to fully eradicate the plant.

Be aware of what poison ivy looks like and remember the adage: ‘if it has leaves of three, let it be'. When you spot or suspect poison ivy in your landscape, call Hartney Greymont or another certified arborist to discuss control options.