Welcome to the World of Poison Ivy, Poison Oak, and Poison Sumac

There is a great deal of confusion about poison ivy vs. poison oak, since there are two kinds of poison ivy and two kinds of poison oak. Learn more.

We also have great products to keep you safe from all 5 of these nasty plants.

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The Blog

March 14, 2018

When you cut down a tree, the sudden presence of sunlight encourages poison ivy vines to grow into the gap.

Here is a stump where the  white snow highlights how the vines, with nowhere to climb, start reaching in all directions, looking for something else to climb up.

February 23, 2018

I had appeared on local media, talking about my favorite topic: poison ivy. After the show, a fellow contacted me to tell me about an abandoned barn in New Hampshire that he said I had to see.

December 22, 2017

When poison ivy climbs it grows thousands of tiny red root hairs to attach to the tree, wall, or other vertical surface.

November 27, 2017

When the leaves fall, many trees, fences, and buildings are revealed to be covered with masses of poison ivy vines. See how this very aggressive vine covers not only the poor tree, but also layers of other poison ivy, all scrambling upward in a nasty competition.