Rosemary grevillea Toxic?

Updated 2026-03-06| 5 min read| 4,454 found this helpful

Grevillea rosmarinifolia A.Cunn.

No confirmed animal poisoning cases linked to Grevillea rosmarinifolia have been published in scientific literature

The plant is not suitable for use as feed for any companion animals or livestock species

Direct skin contact may cause mild allergic contact dermatitis in sensitive human individuals

FAQ

Is Rosemary grevillea toxic to Humans?

Allergic contact dermatitis including itching, redness, and swelling of exposed skin (Low)

Is Rosemary grevillea toxic to Cats?

No confirmed toxicity symptoms reported in available research (Non-toxic)

Is Rosemary grevillea toxic to Dogs?

No confirmed toxicity symptoms reported in available research (Non-toxic)

Is Rosemary grevillea toxic to Horses?

No confirmed toxicity symptoms reported in available research (Non-toxic)

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Toxicity Details

Humans

Low

Allergic contact dermatitis including itching, redness, and swelling of exposed skin

Cats

Non-toxic

No confirmed toxicity symptoms reported in available research

Dogs

Non-toxic

No confirmed toxicity symptoms reported in available research

Horses

Non-toxic

No confirmed toxicity symptoms reported in available research

Toxicity Snapshot

Toxic PartsNo specific toxic plant parts are identified, but all parts are unsuitable for animal consumption; contact with foliage/sap may trigger allergic reactions in humans

Exposure RouteDirect skin contact, accidental ingestion of plant material

Toxic CompoundsNo specific toxic or allergenic compounds have been formally isolated and identified for this species to date

First Aid & Prevention

First 30 Minutes

• Remove any remaining plant material from the mouth of humans or animals immediately after ingestion
• Rinse exposed skin thoroughly with cool water and mild soap if contact with plant tissue occurs
• Monitor for signs of skin irritation, vomiting, or lethargy for at least 24 hours post-exposure

Contact Vet Immediately

• If your companion animal or livestock has ingested large quantities of the plant
• If persistent skin redness, swelling, gastrointestinal upset, or lethargy develops after exposure
• If a human exhibits signs of severe allergic reaction (hives, difficulty breathing, facial swelling)

Prevention

• Avoid planting this species in pastures or areas accessible to grazing livestock and free-roaming pets
• Wear disposable gloves when handling or pruning the plant to reduce risk of contact dermatitis
• Discourage pets and livestock from nibbling on any unknown ornamental Grevillea species

Treatment & Prognosis

• Administer antihistamines as directed by a medical professional or veterinarian for allergic reactions
• Provide supportive care including fluid therapy and gastrointestinal protectants if ingestion causes upset
• No specific antidote exists, all treatment is focused on managing presenting clinical symptoms

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Professional Toxicology

Scientific NameGrevillea rosmarinifolia A.Cunn.

AliasesSpider flower

Toxicity Grade

HumansLow

CatsNon-toxic

DogsNon-toxic

HorsesNon-toxic

Target Organs

SkinGastrointestinal tract

Mechanism of Action

• Allergic contact dermatitis in humans is triggered by uncharacterized allergenic compounds present in plant tissue

• No toxic mechanisms affecting animal species have been identified to date

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle, sheep, goats (livestock): No confirmed poisoning cases reported in literature, but the plant is explicitly not suitable for use as animal feed

Small companion mammals (rabbits, guinea pigs, hamsters): No formal toxicity data available, consumption is strongly discouraged to avoid potential adverse effects

Confusion Risk

The following plants look similar and may be confused:

Other Grevillea species Grevillea spp.

Visually similar in leaf shape and characteristic spider-like flower structure; some other Grevillea species have confirmed toxicity not documented for Grevillea rosmarinifolia

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Related Toxic Plants

Silky Oak

Grevillea robusta

Moderate toxicity, may cause severe contact dermatitis and gastrointestinal upset if ingested

Needle Bush

Hakea sericea

Low toxicity, may cause oral and gastrointestinal irritation if consumed in large quantities

Silver Tree

Leucadendron argenteum

Low toxicity, may trigger mild allergic skin reactions and mild gastrointestinal upset

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Data Sources

1. CliniTox (Universität Zürich)

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

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