What kind of tree is this?

Asked October 20, 2018, 9:11 PM EDT

I found this growing in our "second" back yard. It is self germinated or else growing out of a long dormant stump. I don't recall see a full grown version of this in the back before. Can you tell me what it is and what will happen if I let it grow. thank you, John Marshall

Multnomah County Oregon

1 Response

Thank you for the images of this very weedy tree, the tree-of-heaven, Ailanthus altissima. It will be to your advantage to remove it as soon as possible, while the task is still relatively easy to accomplish.

To verify the ID, review the information in these 2 web sites; the only thing you should ignore is that this seedling tree won't produce seeds for 112 or more years:
- A brochure with a simplified explanation and many useful images: http://www.tenpdx.org/blog.