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I can tell you a definitive YES they will kill your horses if the leaves are ingested in quantity and/or as fallen leaves during fall or when trees are cut. I have had the terrible painful tragedy in fall of 2013 which suddenly killed 5 of my mares. The vets, the vet school, and the State Animal Health and Food Safety lab were on the case and it took over a week to get the indisputable proof, but YES IT ACTS JUST LIKE RED MAPLE POISONING. There will be a veterinary paper published on this, sadly with my sweet horses providing the data.
Answer2:
Although I could not find any real definitive yes or no answer to the question I would have to say it is best to keep horses away from Pistachio trees. The horses could ingest the bark, shells from the nuts, or leaves and possibly choke or colic or even have an allergic reaction.
If you are ever unsure about a plant being toxic to horses you should contact a local equine veterinarian and your local county extension agency to inquire about the plant in question.
What else can I help you with?
Are weeping willow trees toxic to horses?
True weeping willows are not toxic to horses, but other varieties may be.
Are liquid amber trees poisonous to horses?
Liquid amber trees are not poisonous to horses. However, there are many trees and plants that are toxic to horses including lemon, lime, and horseweed.
How big do pistachio trees typically grow?
Pistachio trees typically grow to be around 20 to 30 feet tall.
Can horses eat the bark of a sumac tree?
Horses can typically eat the bark of Sumac trees with no ill effects and it is not listed as being toxic. However it should be noted that if horses are allowed to strip bark off of trees it can and will kill the trees.
How can one identify male and female pistachio trees?
Male and female pistachio trees can be identified by looking at their flowers. Male trees have flowers that produce pollen, while female trees have flowers that develop into nuts. This difference in flower structure helps in distinguishing between male and female pistachio trees.
Are Dogwood trees safe around horses?
Dogwood (trees and shrubs) do not show up on any of the typical lists as being a toxic plant for horses such as the ASPCA. As it does not show up as being toxic on several toxicity lists, dogwood should be fine planted around horses. If you have any further concerns, please check with your horses' veterinarian.
Can you grow pistachio trees in middle Tennessee?
yes
Are mulberry trees poisonous to horses?
According th the ASPCA, Mulberry trees are non-toxic to horses.
How do pistachio nuts grow and develop on the pistachio tree?
Pistachio nuts grow on pistachio trees as clusters of fruits called drupes. These drupes contain the edible seed, which is the pistachio nut. The nuts develop and mature over the course of the growing season, eventually turning from green to a reddish hue before being harvested.
Where can one find information about pistachio online?
Pistachio nuts are a small, dried green fruit that grows on trees. There is a lot on information online about these popular snacks. A good website with a general and basic overview about pistachio nuts is Wikipedia.
Are Thuja green giant trees poisonous to horses?
Yes, Thuja green giant trees are toxic to horses if ingested in large quantities. They contain compounds that can be harmful to horses, leading to symptoms such as gastrointestinal issues, difficulty breathing, and even more serious health issues. It's best to prevent horses from accessing these trees to avoid any potential harm.
Are poplar trees or iris plants poisonous to horses?
No poplar is not toxic, however, the leaves are very high in fibre and it can cause problems in SOME horses if the eat too much of them (i.e. in Autumn when there is lots on the ground). It can block horses up, leaving them gassy and constipated. But as I said, it doesn't necessarily cause problems in all horses. Answer 2: To answer the second part of your question about the Iris plants, yes they are toxic to horses and should be kept far away from them.
