Host an Event Volunteer Join Tickets

Suppport the plant database you love!

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

Sunday - May 16, 2010

From: Denver, CO
Region: Rocky Mountain
Topic: Poisonous Plants
Title: Is arborvitate (Thuja sp.) safe for horses
Answered by: Nan Hampton

QUESTION:

Is arborvitae poisonous to horses? I want to plant it along the horse pasture. If it is poisonous, what are similar plants that are not poisonous to horses?

ANSWER:

Neither Thuja plicata (western arborvitae) nor Thuja occidentalis (eastern arborvitae) appear in any of the toxic plant databases listed below:

ASPCA Toxic and Non-Toxic Plant Lists—Horses

Poisonous Plants of North Carolina

Cornell University Plants Poisonous to Livestock

Toxic Plants of Texas 

University of Pennsylvania Poisonous Plants

Canadian Poisonous Plants Information System

This is a pretty good indication that it would be safe to plant in your horse pasture.

 

 

More Poisonous Plants Questions

Is carrotwood poisonous to Boston Terrier in Rancho Cucamonga CA?
July 20, 2009 - My Boston Terrier always goes to our carrotwood tree and licks the base. He gets so excited that he drools all over the place? Why does this tree cause this reaction in our dog? Is it poisonous to ...
view the full question and answer

Plants for exotic pets
May 14, 2012 - I need to know what are some good native non-toxic plants for these species: Porcelain roach (Gyna lurida) from Kenya, Africa. Giant cave roach (Blaberus giganteus) from Central and South Americ...
view the full question and answer

Is any part of Mountain Laurel poisonous to goats from Belton TX
May 02, 2013 - We are considering planting Mountain Laurel in a field where we keep goats. Will any part of the Mountain Laurel be poisonous if eaten by the goats? If it would be poisonous, could you suggest some o...
view the full question and answer

Ingestion of agave sap from Albuquerque NM
June 11, 2013 - My boyfriend was out in the Arizona desert without water for two days and sought moisture through what he thought was a yucca plant but instead we believe was agave. He sucked the moisture off the ins...
view the full question and answer

Source for seeds of New Mexico locust from Abilene TX
October 23, 2012 - Is there a place to buy Robinia neomexicana native to Texas or order seed from Texas grown plants?
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.