18/09/2026
🌿 Pretty but Poisonous: Plants That Could Put Your Pet at Risk
Some of the most beautiful plants in our Northern Suburbs gardens can be dangerous to our pets.
We love our gardens. We plant colourful flowers, grow lush greenery and decorate our homes with beautiful pot plants. But while we are admiring them, our dogs may be sniffing them, our cats may be nibbling them — and some plants that look completely harmless can cause serious poisoning.
This is particularly important in the Northern Suburbs of Cape Town, where gardens commonly contain ornamental plants such as oleander, cycads, lilies, syringas and other flowering plants.
South African veterinary research has documented poisoning in dogs and cats from a number of plants that are commonly cultivated in southern Africa. Importantly, plant poisoning may be underestimated because not every exposure is reported.
So, before you let your furry friend loose in the garden, take a closer look at what is growing there.
☠️ 1. Oleander – beautiful flowers, dangerous plant
Oleander (Nerium oleander) is a popular ornamental plant and is particularly recognisable by its clusters of pink, white or red flowers.
Unfortunately, every part of the oleander plant can be dangerous if eaten.
Oleander contains cardiac glycosides, including oleandrin, which can interfere with the heart. Dogs and cats that chew on leaves, flowers or other plant material can become seriously ill.
Possible signs include:
Vomiting
Diarrhoea
Drooling
Weakness
Abnormal heart rhythm
Collapse
Oleander poisoning can be life-threatening and requires urgent veterinary attention. South African veterinary literature specifically identifies oleander as a plant capable of causing serious cardiac poisoning.
Garden tip: If you have an oleander where your dog can reach it, don't assume that because your pet has ignored it for years, they always will.
🌴 2. Cycads – the garden plant that can be particularly dangerous
Cycads are beautiful, architectural plants that fit perfectly into many Cape gardens.
But cycads are not pet-friendly plants.
The seeds are particularly concerning, although other parts of the plant can also contain toxic compounds. Cycad poisoning has been documented in dogs in South Africa, including fatal cases.
A curious dog doesn't necessarily understand that the attractive red or orange seeds are something they shouldn't chew.
If your dog has access to cycads, especially if seeds have fallen onto the ground, keep a close eye on them.
Remember: A plant doesn't have to be inside your house to be a hazard. Your garden is part of your pet's environment too.
🌸 3. Lilies – especially important if you have cats
This is one that every cat owner should know.
Certain true lilies, particularly Lilium and Hemerocallis species, can cause severe poisoning in cats, with kidney damage being a major concern.
The danger isn't necessarily limited to eating a large amount of the plant. Cats can be exposed by chewing leaves or flowers and can even encounter pollen that gets onto their coat and is subsequently swallowed during grooming.
This is why lilies deserve special attention in households with cats.
And here's an important point:
Not every plant with "lily" in its name has the same toxicity.
There are many plants commonly called lilies, so identification matters. If you aren't certain what plant you have, don't assume it is safe simply because it is sold as a "lily."
South African veterinary literature includes a wide variety of lilies and lily-like plants among plants of concern for dogs and cats, with true lilies being particularly important because of their potential effects on cats.
Cat owners: when in doubt, keep lilies out.
🌼 4. Arum lilies – not necessarily as innocent as they look
The beautiful arum lily (Zantedeschia aethiopica) is very familiar in South African gardens.
It contains insoluble calcium oxalate crystals, which can cause irritation when plant material is chewed.
Your pet may develop:
Excessive drooling
Mouth irritation
Pawing at the mouth
Difficulty swallowing
Vomiting
Interestingly, arum lily has also appeared in documented South African animal poisoning reports.
So that beautiful white flower growing beside your garden pond may deserve a little more respect than you thought!
🌺 5. Yesterday, Today and Tomorrow
Brunfelsia spp., commonly known as Yesterday, Today and Tomorrow, is a popular flowering garden plant in South Africa.
Its beautiful flowers change colour as they age, making it a favourite in many gardens.
Unfortunately, it is also listed among plants capable of causing poisoning in dogs and cats.
The South African veterinary literature highlights Brunfelsia poisoning as potentially serious, particularly with larger exposures.
So if your dog is the type who thinks every garden plant is a salad bar, this is one to keep well out of reach.
🌳 6. Syringa – don't confuse beauty with safety
The syringa tree (Melia azedarach) is another plant that occurs in South Africa and is included in veterinary reports of plant poisoning.
The berries can be particularly attractive to curious animals.
Signs of poisoning can include gastrointestinal and neurological effects, and serious cases can occur.
Syringa is specifically identified in South African veterinary research as a plant capable of poisoning dogs and cats.
🌵 7. Euphorbias – beware the milky sap
There are numerous Euphorbia species grown as ornamental plants.
Many produce a characteristic white, milky sap when a stem or leaf is damaged.
That sap can be irritating to the skin, eyes and mouth.
Some Euphorbia species are specifically included in South African veterinary reviews of potentially poisonous plants, including Euphorbia tirucalli and Euphorbia pulcherrima (poinsettia).
If your pet chews one, don't wait for severe symptoms before asking for veterinary advice.
🐶 "But my dog has eaten plants before and nothing happened..."
This is one of the biggest misconceptions.
A previous uneventful experience doesn't mean a plant is safe.
The risk can depend on:
The species of plant
Which part was eaten
How much was consumed
The size of the animal
Whether it was a dog or cat
The animal's individual susceptibility
How quickly treatment is started
South African research emphasises that some plant poisonings can be serious or fatal, while early treatment can significantly affect the outcome.
🔎 Take a "pet safety walk" around your garden
Here's a great weekend activity for every pet owner:
Walk around your garden from your pet's point of view.
Get down to their level and look for:
🌿 Plants they can easily reach
🌸 Fallen flowers
🍒 Fallen berries or seeds
🌱 New plants you don't recognise
🪴 Pot plants accessible from balconies or patios
✂️ Garden cuttings lying around
💧 Water containers containing fallen plant material
Don't forget your neighbour's garden over the fence if your dog has access to it.
And remember that gardening waste can also become a problem. A curious dog doesn't know that the pile of freshly cut branches beside the garden shed isn't part of the garden.
🚨 What should you do if your pet eats a plant?
Don't wait and see what happens if you suspect your pet has eaten a potentially poisonous plant.
Remove your pet from the plant.
Try to identify the plant.
Take a photograph of the plant if possible.
If safe to do so, keep a sample of the plant for identification.
Note approximately how much may have been eaten and when.
Contact your veterinarian as soon as possible.
Do not try to make your pet vomit or give home remedies unless a veterinarian specifically instructs you to do so.
If your pet is already showing signs such as repeated vomiting, severe drooling, weakness, tremors, difficulty breathing, collapse or abnormal behaviour, treat it as an emergency.
❤️ A pet-safe garden doesn't have to be a boring garden
The good news?
You don't have to give up gardening because you have pets.
You simply need to know what you're planting and where you're planting it.
Before buying a new plant, take a moment to check:
"Is this safe for my dog, cat, bird or other pet?"
And if you aren't sure — ask someone who knows.
Because our pets investigate the world with their noses, mouths and paws.
They don't read the plant label.
🌿 Beautiful garden.
🐾 Happy pets.
❤️ Safe home.
Because we care.
