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

Saturday - March 21, 2009

From: Parker, CO
Region: Rocky Mountain
Topic: Trees
Title: Trees for Parker, Colorado that will not harm horses
Answered by: Nan Hampton

QUESTION:

we are searching for trees that will grow well in Parker Colorado and not be poisonous to our horses

ANSWER:

The following trees grow in or adjacent to Douglas County, Colorado:

Betula occidentalis (water birch)

Cornus sericea ssp. sericea (redosier dogwood)

Fraxinus pennsylvanica (green ash)

Juniperus scopulorum (Rocky Mountain juniper)

Pinus contorta (lodgepole pine)

Pinus flexilis (limber pine)

Populus angustifolia (narrowleaf cottonwood)

None of them appear in my favorite Toxic Plant databases (Poisonous Plants of North Carolina, Cornell University Plants Poisonous to Livestock, Canadian Poisonous Plants Information System, University of Pennsylvania Poisonous Plants, or Texas Toxic Plant Database.

The Cornus sericea ssp. sericea (redosier dogwood) and the Fraxinus pennsylvanica (green ash) do both occur in the University of California-Davis Toxic Plants) database as possibly causing dermatitis in humans and Juniperus sp. is listed as being a gastrointestinal irritant of mild toxicity if the berries are eaten in large quantities.

Please note that Pinus ponderosa (ponderosa pine) is toxic to livestock, including horses.  If you decide to include pine trees, be sure it is one of the other species named above, not ponderosa pine.

You can see more choices if you go to our Recommended Species page and choose 'Colorado' from the map or pulldown menu.  You can then NARROW YOUR SEARCH by selecting 'Trees' under the Habit (general appearance) option.  If you see another tree that you like, you can check its possible toxicity against the databases above. 

Also, here are several databases that list plants, native and otherwise, that should NOT be included in areas with horses: 

10 Most Poisonous Plants for Horses from EquiSearch.com

Poisonous Plants from Trailblazer Magazine

Toxic Plants:  Horses from the ASPCA

Horse Nutrition:  Poisonous Plants from Ohio State University

You might also like to read Bulletin 415-Plants Poisonous to Livestock in the Western States from the USDA Agricultural Research Service. 


Betula occidentalis

Cornus sericea ssp. sericea

Fraxinus pennsylvanica

Juniperus scopulorum

Pinus contorta

Pinus flexilis

Populus angustifolia

 


 

 

More Trees Questions

Deer resistant, shade tolerant trees for part shade in Highland MD
March 29, 2013 - Deer resistant privacy trees for partial shady area in Highland, MD.
view the full question and answer

Looking for plants for phytoremediation in Columbus, TX
May 27, 2015 - Hello! I am looking for native Texan phytodegrading/rhizodegrading plants (basically I want phytoremediating plants that could be left in place and not have to be removed/disposed of after they had ta...
view the full question and answer

Plants in bloom in April in Stuart FL
February 24, 2012 - Can you tell me which plants I might reasonably expect to see in bloom in April of this year?
view the full question and answer

Pecan trees too close together in Austin
August 14, 2012 - There are two pecan trees in my central Austin yard. Each is four or five inches diameter at chest height and maybe 15 feet tall. They are within six feet of each other and their canopies interfere wi...
view the full question and answer

Montezuma cypress trees for San Antonio
June 23, 2012 - Are Montezuma cypress trees good drought tolerant trees for your yard? I live 30 miles south of San Antonio; would this tree be good for this area?
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2015 Lady Bird Johnson Wildflower Center