The Poison Ivy - Poison Oak Blog

strange poison ivy growth

Every so often you may see this sort of strange growth on a poison ivy vine. We sent the photo off to poison ivy scientist John Jelesko and he reports as follows:

July 10, 2018 - 5:05pm
poison ivy on guard rail

Poison ivy loves roadsides. It loves the sunlight. Birds drop the seeds there, often while sitting on power lines overhead.

We often see poison ivy growing over guard rails, but this example was particularly spectactular.

TAGS: guard rails
July 2, 2018 - 10:03am
poison ivy gate

I hope the folks that need to close this gate every evening realize that it is sitting right inside a nice garland of poison ivy.

TAGS: gate
June 26, 2018 - 10:05am
poison ivy murder

I once got one of the strangest phone calls of my life, and it was because of this website.

A fellow explained that he had a question about poison ivy and my answer might determine if he spent the rest of his life in prison.

TAGS: murder
June 25, 2018 - 2:20pm
monster poison ivy leaf

This photo was sent by a viewer. And this might be the largest poison ivy leaf we have ever seen! Could be 6 x 8 inches, which is enormous.

Because of vastly increased CO2 in the atmosphere, poison ivy is growing larger (and more potent). 

TAGS: large
June 18, 2018 - 1:44pm
poison ivy leaves alternating

A viewer sent in this photo of a poison ivy (or possibly poison oak) vine.

What is striking about this image is how the leaves of three come off the main stem clearly alternating left and right. You rarely get such a clear view of how this works since the leaves usually hide the stems.

TAGS: alternating
June 10, 2018 - 7:46pm
poison ivy on a fence

This photo was sent in by a viewer who wanted to know for sure if this monster was poison ivy.

The answer is... YES IT IS POISON IVY!!!

TAGS: fence
May 30, 2018 - 8:02pm
Black ring of poison ivy vine

This is a photo of a poison ivy vine that was chainsawed along with the tree that it was climbing upon.

TAGS: black sap
May 22, 2018 - 11:40pm
Virginia Creeper versus poison ivy

Here we have two vines that are constantly mistaken for each other, and for good reason: they often grow side by side, or even intertwined.

On the left are two 5-leaflet Virginia creeper leaves, coming from a thin vine. 

May 12, 2018 - 4:23pm
spring poison ivy

I had a conversation with the fellow who runs one of America's leading poison ivy control services.

He grew up very much an outdoor kid, had constant contact with poison ivy, while hunting, fishing and just generally being an All-American kid.

TAGS: age
May 7, 2018 - 10:08am