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Wednesday - August 26, 2009

From: San Antonio, TX
Region: Southwest
Topic: Trees
Title: Are American sycamore or hybrid poplar trees toxic to dogs in San Antonio?
Answered by: Jimmy Mills

QUESTION:

We anticipate planting an American Sycamore or a Hybrid Poplar tree in our back yard but we have several small dogs and are concerned that they may eat some of the leaves. Do either of these trees possess any type of toxic elements that would be harmful to small dogs if consumed? Thanks for your help.

ANSWER:

Mr. Smarty Plants would like to divide this question into two parts; first we'll talk about toxicity, and then we'll discuss plant choices.

There are numerous databases that contain the names of plants that are toxic to diffferent domestic animals, and I have included several below. When you use the database, it is better to use the scientific names for the plants; Platanus occidentalis for the Sycamore, and Populus sp. for the Poplar. Not finding the plant name on the list is not a gaurantee that the plant is non toxic, but it increases the probality that it isn't.

Poisonous Plants of North Carolina

Cornell University Plants Poisonous to Livestock

Toxic Plants of Texas 

University of Pennsylvania Poisonous Plants

ASPCA Toxic and Non-toxic Plant List - Dogs 

When choosing a tree to plant, think about these things; what do I want it do? (shade or ornamental), how much space do I have for it (think about mature size)?; how much "mess" can I tolerate?; what is the normal life span? By perusing this site from the Washington State University Extension, you will gain some insight to answering these and other questions dealing with planting trees.

 Hybrid Poplars have become very popular in the US because they are a fast growing tree with a pleasing columnar mature shape. However, their rapid growth is coupled with a short life span. Generally, they represent crosses between North American Cottonwoods and European Poplars. This link gives some pros and cons regarding planting hybrid Poplars.

The American Sycamore Platanus occidentalis (American sycamore) is a fast growing shade tree that is drought resistant, deer resistant, and can grow to  height of 70 to 100 feet; a very large tree! This WSU Extension site recommends against planting this tree

I'm going to refer you to a couple of previously answered questions; the first one has some good information about other fast growing shade trees for Central Texas, and the second has contains tips for when you are ready to purchase your new tree.

 

More Trees Questions

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May 22, 2013 - Hi Mr/Ms Smarty Plants, We planted a 4-ft Texas Persimmon, Diospyros texana, 2-years ago, with wonderful leaf and fruit production since. We recently had a hail storm (5/9/13) and although mos...
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Escarpment Black Cherry losing leaves in Austin, TX.
July 13, 2012 - Dear Mr. Plants: We live in Austin off of Mount Bonnell Road. We have beautiful 20 foot tall + black escarpment cherry tree very near the house with leaves turning yellow like it's about to drop th...
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June 02, 2009 - Do all tulip trees flower? We planted a baby one about 5 years ago and its grown considerably however it has never flowered. Is that normal? Thank you!
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Possible woodpecker damage in Monterrey Oaks
November 17, 2006 - I live in NW Austin and have two Monterey Oak trees, each about 30 - 45 gal in size. They both were planted approximately 9 months ago. Both trees seem to have some cracking bark on the trunk along w...
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Is the palm tree a true tree?
December 18, 2008 - Hello, There has been constant debate here about the Palm Tree. I'm in Las Vegas and I have heard everything from it not being a true tree but a cacti or a giant thistle?! I've tried to research...
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