En Español

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

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

Leaves falling early from red oaks.
October 08, 2007 - The leaves on my Texas red oaks are dropping off prematurely. This usually doesn't happen until late November/early December. I'm wondering if it has something to do with our wet summer, or if I sho...
view the full question and answer

Danger of lichens damaging trees
September 26, 2007 - My mom lives east of Buda, Texas where she has planted many different kinds of trees, which are all over 10 years old. Now, they all have a moss or lichen growing on the bark of the trees. She is worr...
view the full question and answer

Holes in leaves of wax myrtle from Austin
April 30, 2011 - I just purchased 4 of the 5 gallon Wax Myrtles at the last spring plant sale and after planting them, they are getting eaten by bugs leaving holes in the leaves. I can't find any of the bugs doing th...
view the full question and answer

Decline of pollinating bees around Mexican plums
March 19, 2007 - Dear Dr. Smarty Plants While out working in my yard (about nine miles southwest of the Wildfower Center) this morning, I became aware that there was no sound of bees buzzing. I checked our Mexica...
view the full question and answer

Distance from existing structures to plant a tree in New York
March 05, 2009 - I would like to plant a large maple or birch near my suburban home. How far away from my home, garage, or any buildings should the seed be planted?
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 | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center