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SESK: Stuff Everyone Should Know · sesk.info/horse-maple-leaves-wilted

Which maple leaves are poisonous to horses?

Wilted or dried leaves, not fresh ones.

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  1. Only fresh green leaves
  2. Wilted or dried leaves ✔
  3. No maple leaves at all

Why: Wilted and dried maple leaves, especially red maple, can destroy a horse's red blood cells. Fresh leaves are not considered toxic. Fence pastures off from fallen limbs after storms and in autumn.

Huh, didn't know that: UMN says dried maple leaves can stay toxic for about four weeks.

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References

Answer: Wilted or dried leaves. Wilted and dried maple leaves, especially red maple, can destroy a horse's red blood cells. Fresh leaves are not considered toxic. Fence pastures off from fallen limbs after storms and in autumn.

  1. Are maple leaves toxic to horses?, UMN Extension extension.umn.edu/node/12866
    Fresh maple leaves aren't toxic.
    Checked 2026-10-10.
  2. Red Maple, ASPCA Toxic and Non-Toxic Plants www.aspca.org/pet-care/animal-poison-control/toxic-and-non-toxic-plants/red-maple
    Wilted leaves are most toxic.
    Checked 2026-10-10.

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