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From: Merced, CA
Region: California
Topic: Shade Tolerant
Title: Shade trees for horses in Merced, CA
Answered by: Nan Hampton
First, let me tell you which trees are not safe to plant around horses. Avoid all Quercus species (oaks) and Prunus species (plums, peaches, cherries, apricots, etc.). Also, do not plant Acer rubrum (scarlet maple) or any Acer species—see Toxic Plants of Texas. Most pine species are not listed on any toxic plant database, but Pinus ponderosa (Ponderosa pine) does appear on several of the databases below and should not be planted near cattle or horses.
Now, here are some that are safe and will provide shade for them:
Fraxinus dipetala (California ash) is a small deciduous tree (up to 20 feet) with fragrant white flowers. Here are photos and more information.
Populus fremontii (Fremont cottonwood) is fast-growing and grows to 60 feet, but it does like moderate water. Female plants produce cotton (the seeds), male plants do not. The 'Nimbus' variety is male. Here are more photos and information.
Platanus racemosa (California sycamore) grows fast and can reach 30 to 80 feet, but will need water until established. Here are more photos and information.
Cercis orbiculata [syn. Cercis occidentalis var. orbiculata] (California redbud) is a small tree (up to 15 feet) with pink blossoms in the spring. Here are more photos and information.
Umbellularia californica (California laurel) is evergreen and a slow-grower to 40 feet. Here are more photos.
Here are databases that you can use to check on toxicity of plants to horses and other animals:
Pennsylvania's Poisonous Plants from the Universtiy of Pennsylvania
Cornell University Plants Poisonous to Livestock
ASPCA's Toxic and Non-Toxic Plant List - Horses
Horse Nutrition: Poisonous Plants from Ohio State University Extension Service
10 Most Poisonous Plants for Horses from Equisearch
Here are photos from our Image Gallery of some of the trees listed above:
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Plant for part sun in Nampa Idaho
May 20, 2010 - What could I plant in arid SW Idaho on the northwest side of my house along a border against the house? Most of the day this area is in shade, but at the hottest time of the day it gets a couple of h...
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April 05, 2013 - I have a very large pine tree that I would like to plant some flowers under. I have hostas, stonecrop and fern, but like to add some color. What do you suggest? Thank you.
view the full question and answer
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