En EspaŅol

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.
 
rate this answer
Not Yet Rated

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

New growth on live oaks in Houston
September 27, 2011 - My 2 10yr. old live oaks are putting out new growth (branches?) although, here in Houston, TX we are having such a drought. For the last 3 months, I have conscientiously watered my entire yard via ...
view the full question and answer

Fan-Tex ash tree roots a problem near house foundation from Bryan TX
February 23, 2013 - DO I need to worry about Fan TX roots being a problem near house foundations?
view the full question and answer

Madrone too close to house in Oregon
February 02, 2009 - I have a small Madrone tree (8ft tall) located approximatly 15 feet from my house, with a basement. Should I remove it? ie will it damage the foundation and is the tree strong enough that it will no...
view the full question and answer

Why doesn't my Possum Haw have berries this year?
May 20, 2010 - A possumhaw holly has no berries as of mid-May. I planted this possumhaw last summer - it had lots of berries. Why would it have no berries this year? This spring I have two yaupons with lots of b...
view the full question and answer

Problem with crapemyrtle shoots in Victoria, TX
May 13, 2009 - I have a problem with crepe myrtle shoots coming up in my flowerbed. I had to remove a large crepe myrtle tree (18" diameter stump) and digging out the stump was not possible. I killed the stump wi...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2016 Lady Bird Johnson Wildflower Center