5 Common Garden Plants Toxic to Chickens (Australia)
Many beautiful garden plants can poison or kill your chickens. Knowing which plants to remove or fence off could save your flock's life.
Why Garden Plants Are a Hidden Risk
Free-ranging chickens naturally forage and sample plants as they explore. While chickens usually avoid bitter or toxic plants, hungry birds, curious pullets, or limited foraging options can lead to accidental poisoning.
Some plants are so toxic that even a few bites can cause serious illness or death. The safest approach is to identify and remove or fence off toxic plants entirely.
Good News
Most chickens naturally avoid toxic plants if they have plenty of other things to eat. Healthy, well-fed birds with access to grass and insects rarely poison themselves.
Backyard Plant Safety Lookup
Instantly check if a common backyard plant is safe for your flock.
Rhubarb Leaves
❌ TOXICContains high amounts of oxalic acid, which can cause kidney failure or soft-shelled eggs. (Note: Stalks are generally safe in tiny amounts, but avoid feeding them entirely to be safe).
Azaleas / Rhododendrons
❌ DEADLYContains grayanotoxins. Even pecking a few leaves or flowers can cause severe neurological issues or death. Keep coops far away.
Tomato / Potato Plants (Green Parts)
⚠️ AVOIDLeaves and stems contain solanine (a toxic alkaloid). Ripe tomatoes are perfectly fine, but never toss the vines into the chicken run.
Sunflowers
✅ SAFE & HEALTHYAn absolute favourite. The seeds are packed with healthy fats and protein, and the petals are completely safe. Great boredom buster!
Rosemary & Lavender
✅ SAFE & BENEFICIALHighly aromatic herbs that are completely safe to eat. Great for scattering fresh in the nesting boxes to repel pests and soothe laying hens.
Showing 5 of 5 common backyard plants.
5 Toxic Plants to Remove or Fence Off
These common garden plants are dangerous to chickens
| Plant | Toxicity | Toxic Parts | Symptoms |
|---|---|---|---|
OleanderNerium oleander | Highly toxic | All parts | Drooling, weakness, diarrhoea, tremors, sudden death |
Azalea / RhododendronRhododendron spp. | Highly toxic | All parts, especially leaves | Vomiting, weakness, abnormal heart rhythm, collapse |
RhubarbRheum rhabarbarum | Toxic | Leaves (stalks are safe) | Kidney failure, tremors, difficulty breathing |
FoxgloveDigitalis purpurea | Highly toxic | All parts | Heart arrhythmia, weakness, sudden death |
Nightshade FamilySolanaceae | Toxic | Green parts, unripe fruit | Confusion, diarrhoea, weakness, paralysis |
1. Oleander
Highly toxicNerium oleander
Even small amounts can be fatal. Common in Australian gardens as hedges.
2. Azalea / Rhododendron
Highly toxicRhododendron spp.
Popular ornamental plant. Keep chickens well away from garden beds.
3. Rhubarb
ToxicRheum rhabarbarum
Never feed rhubarb leaves. The stalks humans eat are fine in small amounts.
4. Foxglove
Highly toxicDigitalis purpurea
Contains cardiac glycosides. Beautiful but deadly.
5. Nightshade Family
ToxicSolanaceae
Includes potato leaves/sprouts, tomato leaves, and deadly nightshade. Ripe tomatoes are safe.
Signs of Plant Poisoning in Chickens
If you notice any of these symptoms, especially suddenly, plant poisoning may be the cause:
What to Do If a Chicken Eats a Toxic Plant
- 1
Remove access to the plant
Fence off the area or remove the chicken from the garden immediately.
- 2
Provide fresh water
Encourage the bird to drink to help dilute toxins.
- 3
Activated charcoal (if available)
Some keepers use activated charcoal to help absorb toxins. Mix with water and syringe gently.
- 4
Keep the bird calm and isolated
Reduce stress and monitor closely in a quiet, comfortable space.
- 5
Contact a vet if symptoms worsen
An avian vet can provide supportive care. Bring a sample of the plant if possible.
Unfortunately, there is no antidote for most plant poisonings. Prevention is always better than treatment.
How to Make Your Garden Chicken-Safe
Practical steps to protect free-ranging birds
Identify & Remove
Walk through your garden and identify toxic plants. Remove them entirely or transplant to an area chickens cannot access.
Fence Off Garden Beds
Use low fencing or netting to keep chickens out of ornamental garden beds where toxic plants may grow.
Plant Safe Alternatives
Replace toxic ornamentals with chicken-safe options like herbs (oregano, thyme), sunflowers, or native grasses.
Keep Them Well Fed
Well-fed chickens with access to quality pellets and greens are far less likely to sample toxic plants out of hunger.
Native Australian Plants Notice
While many Australian natives are safe, some (like certain Grevilleas or seeds from Cycads) can be irritants. When in doubt, stick to planting chicken-friendly herbs like Rosemary and Oregano which double as 'Quiet Business' insect repellents.
The Bottom Line
Plant poisoning is uncommon but preventable. If you keep your chickens well-fed and remove or fence off known toxic plants, the risk drops to almost zero.
When in doubt, remove the plant. It's not worth the risk.