Crepe Myrtle Toxic?

Updated 2026-03-06| 4 min read| 3,098 found this helpful

Crepe myrtle is classified as non-toxic to cats, dogs, and horses, with no confirmed poisoning events linked to casual ingestion

No parts of the crepe myrtle plant have been identified as toxic to common domestic animals or humans

Accidental small consumption of crepe myrtle does not require emergency intervention for most humans and domestic animals

FAQ

Is Crepe Myrtle toxic to Humans?

No known toxic symptoms from casual ingestion; rare mild stomach upset may occur in sensitive individuals eating very large quantities (Non-toxic)

Is Crepe Myrtle toxic to Cats?

No toxic symptoms expected; mild, transient soft stool may occur only if extremely large volumes are consumed (Non-toxic)

Is Crepe Myrtle toxic to Dogs?

No toxic symptoms expected; mild temporary gastrointestinal discomfort may occur after ingestion of very large amounts of plant material (Non-toxic)

Is Crepe Myrtle toxic to Horses?

No toxic symptoms recorded; occasional mild indigestion may occur if the plant is overconsumed in large quantities (Non-toxic)

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Toxicity Details

Humans

Non-toxic

No known toxic symptoms from casual ingestion; rare mild stomach upset may occur in sensitive individuals eating very large quantities

Cats

Non-toxic

No toxic symptoms expected; mild, transient soft stool may occur only if extremely large volumes are consumed

Dogs

Non-toxic

No toxic symptoms expected; mild temporary gastrointestinal discomfort may occur after ingestion of very large amounts of plant material

Horses

Non-toxic

No toxic symptoms recorded; occasional mild indigestion may occur if the plant is overconsumed in large quantities

Toxicity Snapshot

Toxic PartsNo confirmed toxic parts; all plant segments are considered safe for casual exposure and ingestion by common domestic animals

Exposure RouteNo known toxic exposure routes; contact, pollen inhalation, or small-scale ingestion carry no poisoning risk

Toxic CompoundsNo toxic phytochemicals linked to poisoning in humans or common domestic animals have been documented for this species

First Aid & Prevention

First 30 Minutes

• Rinse the mouth of the exposed individual/animal to remove any remaining plant residue if large amounts were ingested
• Monitor for 1 to 2 hours for any signs of unusual discomfort or rare allergic reaction
• Offer small amounts of fresh drinking water to reduce risk of mild gastrointestinal irritation

Contact Vet Immediately

• Persistent vomiting, diarrhea, or lethargy lasting more than 24 hours after ingestion
• Signs of allergic reaction including swelling, hives, or difficulty breathing post-exposure
• Exposed animal has pre-existing severe plant allergies or chronic gastrointestinal conditions

Prevention

• No specific prevention is required for this non-toxic species
• Keep crepe myrtle treated with pesticides or chemical fertilizers away from pets and livestock to avoid exposure to added toxins
• Dispose of garden trimmings in closed bins if they have been treated with horticultural chemicals

Treatment & Prognosis

• Supportive care only for rare mild gastrointestinal symptoms, including dietary rest and fluid administration
• Antihistamines may be prescribed by a medical or veterinary professional for rare allergic reactions
• No specific antidote is required as no inherent toxic effects are associated with this plant

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Professional Toxicology

Scientific NameLagerstroemia indica

AliasesCrape Myrtle

Toxicity Grade

HumansNon-toxic

CatsNon-toxic

DogsNon-toxic

HorsesNon-toxic

Target Organs

No organs are known to be targeted by toxic compounds from this species

Mechanism of Action

• No toxic mechanism has been identified, as the plant contains no confirmed harmful phytochemicals for humans or common domestic animals

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: No confirmed toxicity reported; overconsumption may lead to mild, temporary indigestion

Sheep: No documented toxic effects, considered safe for grazing in moderate quantities

Small mammals (rabbits, guinea pigs): No known toxicity, can be safely offered as a minor part of a varied forage diet

Confusion Risk

The following plants look similar and may be confused:

Oleander Nerium oleander

Oleander has similar elongated green foliage and bright clustered blooms to crepe myrtle, but is highly toxic. Key difference: oleander has narrow, leathery evergreen leaves and lacks crepe myrtle's distinctive peeling bark.

Mountain Laurel Kalmia latifolia

Mountain laurel produces showy clustered pink/white blooms resembling crepe myrtle, but is highly toxic. Key difference: its leaves are glossy evergreen, and blooms are bell-shaped unlike crepe myrtle's ruffled, crepe-like petals.

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Related Toxic Plants

Purple Loosestrife

Lythrum salicaria

Low toxicity, may cause mild gastrointestinal upset if ingested in large quantities

Henna

Lawsonia inermis

Moderate toxicity, ingestion can cause gastrointestinal distress and hemolytic anemia in sensitive individuals/animals

Scarlet Toothcup

Ammannia coccinea

Low toxicity, consumption may trigger mild abdominal pain and vomiting in humans and small pets

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Data Sources

1. ASPCA Animal Poison Control

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.