Houseplants and pets: coexisting safely

Houseplants transform a living space. They purify the air, structure the decor, and bring an essential natural dimension. However, when sharing a home with a cat or dog, certain species can pose a real risk.

Toxicity isn't limited to massive ingestion. Some plants cause immediate irritation, while others contain systemic toxins that can affect the kidneys or liver. There are also mechanical risks associated with thorns and irritating latex.

Why do animals chew on plants?

Chewing plants is a common behavior in cats and dogs. This action may seem harmless, but it often fulfills specific physiological or behavioral needs. Understanding these motivations allows you to anticipate risks and adapt the home environment.

Behavioral factors

Certain natural behaviors explain animals' attraction to foliage.

Curiosity and exploration of the environment
Boredom or lack of stimulation
Stress or recent changes in the home
Young animals in the learning phase
Instinctive search for fiber (especially in cats)
Gaming behavior

In cats, the occasional ingestion of plants may be linked to a natural digestive reflex.

Environmental factors

Interior design strongly influences plant accessibility.

Plants placed on the ground or at nose height
Frequent transit areas
No safe alternatives (catnip, toys)
Presence of attractive drooping leaves
Loose or fragrant substrate

The more accessible and visually stimulating a plant is, the more likely it is to be explored.

Understanding the different types of risks

Not all poisonous plants pose the same danger. Some cause immediate and localized irritation, while others act more slowly and can affect vital organs. Identifying the type of risk helps assess the potential severity of exposure.

Local irritants

Found particularly in plants containing calcium oxalate crystals, these compounds cause an immediate reaction upon contact with mucous membranes.

Excessive salivation
Mouth pain or burning
Mild to moderate vomiting
Swelling of the lips or tongue
Temporary refusal to eat

These symptoms appear quickly after chewing and are usually linked to plants such as philodendrons, pothos or dieffenbachia.

Systemic toxins

Some species contain substances absorbed into the bloodstream that can affect internal organs.

Acute kidney injury (lily in cats)
Severe liver damage (cycas)
Heart problems
Neurological effects (tremors, seizures)
Marked depression or lethargy

These poisonings require rapid veterinary intervention, as the damage can develop within hours.

Mechanical and physical risks

Regardless of any chemical toxicity, some plants can cause physical injuries.

Micro-spines or glochids (some cacti)
Eye injuries
Paw pad wounds
Digestive obstruction if fiber is ingested
Latex is irritating to the skin

These risks are particularly relevant to succulent plants, cacti or euphorbias with irritating sap.

Plants toxic to cats and dogs - indoors and outdoors

Botanical genera that pose a risk to domestic animals

Some ornamental plants contain irritants or toxins that can cause digestive, neurological, cardiac, hepatic, or renal problems in cats and dogs. The severity depends on the amount ingested, the part consumed (leaves, sap, bulb, seeds), and the animal's sensitivity.

Bulbs, seeds and young shoots often concentrate the most active toxins.

Houseplants at risk

Botanical genus	Common noun	Main risk
Cycas	Sago Palm	Severe hepatotoxicity – potentially fatal
Lilium	True lilies	Acute renal failure in cats
Adenium	Desert rose	Cardiotoxic
Epipremnum	Pothos (trade name)	Oxalates – oral and digestive irritation
Scindapsus	Satin pothos	Oxalates – excessive salivation and oral pain
Philodendron	Philodendron	Inflammation of the mucous membranes
Monstera	Monstera	Digestive irritation
Dieffenbachia	Mute's cane	Significant oral edema
Dracaena	Dracaena / Sansevieria	Vomiting and lethargy
Alocasia	Alocasia	Oxalates – severe irritation
Anthurium	Anthurium	Oxalates – oral irritation
Aglaonema	Aglaonema	Oral irritation
Ficus	Ficus	Latex is irritating – digestive problems
Schefflera	Schefflera	Oxalates – hypersalivation
Syngonium	Syngonium	Oral irritation
Zamioculcas	ZZ Plant	Oxalates – digestive irritation
Kalanchoe	Kalanchoe	Cardiotoxic in dogs
Begonia	Begonia	Toxic rhizomes
Cyclamen	Cyclamen	Highly toxic bulb
Euphorbia	Spurge	Latex is a skin and eye irritant.
Aloe	Aloe	Digestive irritation
Hippeastrum	Amaryllis	toxic bulb

Outdoor and garden plants at risk

Botanical genus	Common noun	Main risk
Nerium	Oleander	Major cardiotoxic
Taxus	If	Serious cardiac toxicant
Digitalis	Digital	Cardiotoxic
Ricinus	Castor oil	Extremely toxic seeds
Datura	Datura	Neurotoxic
Brugmansia	Trumpet of the angels	Neurotoxic
Rhododendron	Rhododendron / Azalea	Cardiac and neurological disorders
Hydrangea	Hydrangea	Digestive problems
Buxus	Boxwood	Digestive toxicity
Ilex	Holly	Poisonous berries
Prunus	Cherry tree / Cherry laurel	Cyanogenic compounds
Tulipa	Tulip	Bulb concentrated in toxins
Hyacinthus	Hyacinth	Irritant bulb
Narcissus	Narcissus	toxic bulb
Colchicum	Autumn crocus	Severe systemic toxicity

Plants generally compatible

Important to remember

No plant is completely "safe" if consumed in large quantities. The species listed below are generally considered non-toxic to cats and dogs, but supervision remains essential, especially with young animals.
Warning: some common names are confusing (ex: "Lucky Bamboo" = often Dracaena).