Aconite (roots, foliage, seeds) - Aconitum species Toxic if eaten, causing nausea and vomiting. May also affect cardiac function – increased heart rate.
African violet (leaves) Saintpaulia ionantha
Aloe vera - Diarrhoea
Amaryllis (bulbs) Hippeastrum species - Upset stomach, hyperactivity, lethargy, coma, shock. Can be fatal.
Angels’ trumpets Brugmansia species - Toxic if eaten, causing nausea and vomiting.
Angel wings Caladium species - Upset stomach, oral irritation, asphyxiation, tremors, seizures, loss of balance. Can be fatal.
Apple (seeds) Malus species - Seeds contain cyanide. Varied toxic effects.
Apple leaf croton
Apricot (kernels) Prunus armeniaca - Kernels contain cyanide. Can be fatal.
Arborvitae Thuja species - Harmful if eaten in quantity. May cause a skin allergy.
Arrow grasses (leaves) Triglochin species
Asparagus fern Asparagus setaceus - Contains a wide variety of poisons resulting in a large range of symptoms.
Autumn crocus Crocus speciosus - Vomiting, nervous excitement. May cause dermatitis.
Avocado (fruit & pith) Persea americana - Diarrhoea, vomiting, laboured breathing. Can be fatal.
Azalea (all parts) Rhododenron occidentale - Nausea, vomiting, depression, difficulty breathing and coma. Can be fatal if eaten in large enough quantities.
Baby’s breath Gypsophila paniculata
Barilla (leaves & stems) Salsola soda
Bird of paradise (seeds) Strelitzia reginae - Gastrointestinal tract affected by the plant toxins.
Bittersweet Celastrus angulatus - Toxic if eaten, causing nausea and vomiting.
Bleeding heart (foliage, roots) Dicentra formosa - Poisonous in large amounts, contains convulsants. May also cause dermatitis.
Bluebell Hyacinthoides - Harmful if eaten in quantity.
Box (leaves) Buxus sempervirens
Boxwood (leaves, twigs) Hebe odora - Upset stomach, heart failure, excitability or lethargy. May also cause dermatitis.
Bracken Pteridium aquilinum - Thiamine deficiency, acute haemorrhagic syndrome, blindness, tumours
Broom Cytisus species
Buckeyes (nuts & immature growths) Aesculus species - Harmful if eaten in quantity.
Burning bush Kochia scoparia - Toxic if eaten, causing nausea and vomiting. May cause a skin allergy.
Buttercup Ranunc
Caladium Caladium species
Calico bush Kalmia species - Harmful if eaten in quantity.
Calla lily (leaves) Zantedeschia species (as above)
Caper Spurge Euphorbia lathyris
Cardinal flower Lobelia cardinalis
Castor bean (leaves and seeds) Ricinus communis - May cause dermatitis. A single Rosary Pea or one/two Castor bean seeds can be fatal.
Ceriman Monstera deliciosa - Causes diarrhoea and oral irritation if eaten. May cause dermatitis.
Chenille Plant Acalypha hispida
Cherry (kernels) Prunus species - Kernels contain cyanide.
Cherry laurel Prunus laurocerasus - Harmful if eaten in quantity.
China Berry Melia azedarach
Chinese evergreen Aglaonema
Christmas rose (leaves, roots) Helleborus niger - Harmful if eaten in quantity.
Chrysanthemum (leaves & stems) Chrysanthemum species - May cause dermatitis.
Cineraria Senecio species
Clematis Clematis armandii - Gastrointestinal tract and nervous system affected by plant toxins. May cause dermatitis.
Cocoa husks or mulch - Similar toxic effects to that of chocolate – hyperactivity, increased heart rate. Can kill if enough is eaten.
Corn cockle (seeds) Agrostemma species - Harmful if eaten in quantity.
Corn plant Dracaena species
Crocus Anemone species
Colchicum autumnale
Croton Codiaeum species
Crown vetch Coronilla varia Cuckoo pint Arum maculatum - Toxic if eaten, causing nausea and vomiting. May cause a skin allergy.
Crowfoot Anunculus species
Cycads Encephalartos species
Cyclamen Cyclamen species - Gastrointestinal tract affected. Convulsions and paralysis.
Daffodil (bulbs) Narcissus species - Nausea, vomiting, diarrhoea. May also cause dermatitis. Can be fatal.
Daphne Daphne species - Gastrointestinal tract and kidneys affected. May cause dermatitis.
Datura Brugmansia species
Deadly nightshade Atropa belladonna - Toxic if eaten, causing nausea and vomiting.
Delphinium (seeds, young plants) Delphinium species - Harmful if eaten in quantity.
Devil’s fig Solanum hispidium - Harmful if eaten in quantity.
Dieffenbachia Dieffenbachia species - Causes diarrhea and oral irritation if eaten. May cause dermatitis. Tremors, seizures, loss of balance, asphyxiation. Can be fatal.
Dragon tree Dracaena species - Vomiting and diarrhoea.
Dumb cane Dieffenbachia amaena - Causes diarrhoea and oral irritation if eaten. May cause dermatitis. Tremors, seizures, loss of balance, asphyxiation. Can be fatal.
Dwarf morning glory Convolvulus tricolor - Harmful if eaten in quantity.
Easter lily Lilium longiflorum (Especially poisonous to cats).
Echium Echium species - Harmful if eaten in quantity. May cause a skin allergy.
Elder (leaves, root, bark) Sambuccus species
Elderberry Sambucus canadensis - Nausea and vomiting.
Elephant ears Bergenia species - Intense burning, irritation and swelling of the mouth and throat. If tongue swells enough to block air passage can be fatal.
English ivy (berries & leaves) Hedera helix - Gastrointestinal tract affected. May cause dermatitis.
European spindle Euonymus europaeus - Harmful if eaten in quantity.
False hellebore (roots, seeds, leaves) Veratrum album - Toxic if eaten, causing nausea and vomiting.
Flannel flower Phylica plumosa - Harmful if eaten in quantity.
Flax Linum usitatissimum - Harmful if eaten in quantity.
Foxglove (leaves, seeds) Digitalis species - Toxic if eaten, causing nausea and vomiting.
Fritillary Fritillaria species
Fruit salad plant Monstera deliciosa - Causes diarrhoea and oral irritation if eaten. May cause dermatitis.
Gaultheria Gaulthera mucronata - Harmful if eaten in quantity.
Geranium Geranium species
German ivy (berries & leaves) Delairea odorata - Gastrointestinal tract affected. May cause dermatitis.
German primula - Toxic if eaten. May cause skin allergy.
Glory lily Gloriosa superba - Toxic if eaten, causing nausea and vomiting.
Golden chain (seed capsules) Laburnum - Toxic if eaten, causing nausea and vomiting.
Granny’s bonnets Aquilegia vulgaris - Harmful if eaten in quantity.
Heavenly bamboo Nandina domestica
Hellebores Helleborus species
Heliotrope Heliotropum arborescens
Hemlock Tsuga species
Henbane Hyposcyamus niger - Toxic if eaten, causing nausea and vomiting.
Hibiscus Hibiscus species
Holly (berries) Ilex species - Upset stomach, tremors, seizures, loss of balance.
Horse chestnut (nuts, leaves) Aesculus hippocastanum - Harmful if eaten in quantity.
Hurricane plant (bulb) Monstera deliciosa - Varied toxic effects. Causes diarrhoea and oral irritation if eaten. May cause dermatitis.
Hyacinth (bulbs) Hyacinthus orientalis - Harmful if eaten in quantity. May cause a skin allergy.
Hydrangea Hydrangea species
Iris (roots) Iris species - Severe digestive upset. May cause dermatitis.
Ivy (entire plant) Hedera helix - Harmful if eaten in quantity.
Jack in the pulpit Arisaema species - Causes burning to the mouth. Can cause hallucinations.
Japanese spindle Euonymus sieboldianus - Harmful if eaten in quantity.
Japanese yew Taxus species Jessamine (berries & sap) Cestrum species - Digestive disturbance. Gastrointestinal tract and nervous system affected. Can be fatal.
Jerusalem Cherry (immature growths) Solanum pseudocapsicum - Gastrointestinal tract affected. May cause dermatitis.
Jimson weed (Thorn Apple) Datura stramonium - Abnormal thirst, distorted sight, delirium, incoherence, coma. Can be fatal.
Jonquil (bulb) Narcissus species
Juniper Juniperus species
Kalanchoe Kalanchoe species - Depression, rapid breathing, teeth grinding, ataxia, paralysis
Kale Brassica oleracea - Haemolytic anaemia, goitre, possible reduced fertility
Kingcup Caltha palustris - Harmful if eaten in quantity.
Laburnum (leaves, seeds) Laburnum anagyroides - Toxic if eaten, causing nausea and vomiting.
Lantana Lantana camara - Toxic if eaten, causing nausea and vomiting.
Larkspur (young plants & seeds) Delphinium species - Digestive upset, nervousness, depression. Cardiovascular system affected. May cause dermatitis. Can be fatal.
Laurel Prunus species - Harmful if eaten in quantity.
Lenton rose Helleborus orientalis - Harmful if eaten in quantity.
Leopard lily Belamcanda species - Toxic if eaten, causing nausea and vomiting. May cause a skin allergy.
Leyland cypress Cupressocyparis leylandii - Harmful if eaten in quantity. May cause a skin allergy.
Lily Lilium species - Harmful if eaten in quantity.
Lily of the valley (leaves, flowers, roots) Convallaria species - Toxic if eaten, causing nausea and vomiting.
Lily of the valley bush Pieris japonica
Lobelia Lobelia species - Harmful if eaten in quantity. May cause a skin allergy.
Locust Robinia species - Nausea and weakness
Lupin (leaves, seeds) Lupinus species - Harmful if eaten in quantity.
Mallow Lavatera species - Harmful if eaten in quantity.
Maple Tree Acer species
Marijuana Cannabis sativa - Contains hallucinogens.
Marsh marigold Caltha palustris - Harmful if eaten in quantity.
May apple (apples, roots, foliage) Podophyllum peltatum - Severe diarrhoea. Nervous system affected.
Meadow rue Thalistrum delavayi - Harmful if eaten in quantity.
Mezereon Daphne mezereum
Milkweed Ascepias syriaca - Harmful if eaten in quantity. May cause a skin allergy.
Mistletoe (berries) Phoradendron flavescens - Gastrointestinal tract affected. May cause dermatitis. If eaten by a puppy, a few berries can be fatal.
Monkshood Aconitum napellus - Digestive upset and nervous excitement. Cardiovascular system affected.
Morning glory (seeds, roots) Ipomea species Harmful if eaten in quantity.
Moroccan broom Cytisus battandieri - Harmful if eaten in quantity.
Mother-in-law’s tongue (leaves) Dieffenbachia amaena - Causes diarrhoea and oral irritation if eaten. May cause dermatitis. Tremors, seizures, loss of balance, asphyxiation. Can be fatal.
Mountain laurel Kalmia latifolia - Harmful if eaten in quantity.
Naked ladies Colchium species - Toxic if eaten, causing nausea and vomiting.
Narcissus Narcissus (bulbs) - Nausea, vomiting, diarrhoea. May cause dermatitis. Can be fatal.
Needlepoint ivy (berries & leaves) - Gastrointestinal tract affected. May cause dermatitis.
Nerine Nerine bowdenii
Nightshades Solanum species - Intense digestive disturbances. Can be fatal.
Oak tree (foliage & acorns) Quercus species - Affects kidneys. Symptoms appear after several days.
Oleander Nerium oleander - Affects the heart, produces severe digestive upset, extremely poisonous. May cause dermatitis. Can be fatal.
Onion Allium species - Causes anemia. Onions should not be fed to dogs in any form.
Paspalum (seeds) Paspalum species Dermatitis
Pasque flower Pulsatilla vulgaris - Harmful if eaten in quantity.
Peace lily Spathiphyllum species - Gastrointestinal tract affected. May cause dermatitis.
Peach (stones & leaves) Prunus persica - Contain cyanide.
Pencil cactus Opuntia leptocaulis
Peony (roots) Paeonia species
Peruvian lily Chlidanthus fragans - Harmful if eaten in quantity. May cause a skin allergy.
Philodendron Philodendron species (leaves) - Causes diarrhoea and oral irritation if eaten. May cause dermatitis.
Pineapple broom Cytisus battandieri - Harmful if eaten in quantity.
Poinsettia (leaves, stems & sap) Euphorbia pulcherrima - Diarrhea, abdominal cramps, delirium. Sap can cause irritation and if rubbed in eyes, blindness. May also cause dermatitis.
Poison hemlock Conium maculatum - Nervous system affected. May cause dermatitis. Can be fatal.
Poison ivy (leaves, bark & fruit) Toxicodendron radicans - Poisonous. Can cause severe blistering dermatitis if they come into contact with skin.
Poison oak (leaves, bark & fruit) Toxicodendron - May cause dermatitis.
Poison sumac Toxicodendron vernix - Poisonous. Can cause severe blistering dermatitis if they come into contact with skin.
Pokeroot Phytolacca americana - Toxic if eaten, causing nausea and vomiting.
Pokeweed Phytolacca americana - Toxic if eaten, causing nausea and vomiting.
Poppy (unripe seedpod) Papaver species - Harmful if eaten in quantity.
Potato (green skin & sprouts) Solanum tuberosum
Prickly poppy Argemone mexicana - Harmful if eaten in quantity.
Primrose (leaves) Primula vulgaris - Upset stomach. May cause dermatitis.
Privet (leaves) Ligustrum species - Harmful if eaten in quantity.
Ragwort Senecio species - Causes kidney failure and liver damage which is irreversible. Minute doses fatal, often wrongly diagnosed.
Raisins - Causes kidney failure. Can be fatal.
Rape Brassicus napus - Haemolytic anaemia, blindness, damage to nervous system, digestive disorders, breathing problems
Red-ink plant Phytolacca americana - Toxic if eaten, causing nausea and vomiting.
Rhododendron Rhododendron species - Nausea, vomiting, depression, difficulty breathing and coma. Can be fatal.
Rhubarb (leaves) Rheum species - Large amounts of raw or cooked leaves can cause convulsions and coma. Can be fatal.
Rosebay Rhododendron aureum - Toxic if eaten, causing nausea and vomiting.
Ros periwinkle Catharanthus roseus - Harmful if eaten in quantity.
Rue Ruta graveolens - Toxic if eaten, causing nausea and vomiting. May cause a skin allergy.
Sago palm Cycas revoluta - Can be fatal
Savin Juniperus sabina - Harmful if eaten in quantity.
Schefflera Brassaia actinophylla - Harmful if eaten in quantity. May cause a skin allergy.
Silkweed Asclepias species - Harmful if eaten in quantity.
Snowdrops Galanthus species
Solomon’s seal Polygonatum - Harmful if eaten in quantity.
Spider plant Chlorophytum species - May cause vomiting and salivation.
Spruce Tree Picea species
Spurge Euphorbia species - Harmful if eaten in quantity. May cause a skin allergy.
Squill Scilla species - Harmful if eaten in quantity.
Star-of-Bethlehem (bulbs) Ornithogalum species - Harmful if eaten in quantity.
Starflower Smilacina stellata - Harmful if eaten in quantity.
St Johns Wort Hypericum perforatum - Harmful if eaten in quantity.
String of pearls/beads Senecio rowleyanus or herreianus
Sweet pea (stem) Lathyrus odoratus - Harmful if eaten in quantity.
Swiss cheese plant Monstera deliciosa - Causes diarrhoea and oral irritation if eaten. May cause dermatitis.
Taro vine Monstera deliciosa - Causes diarrhoea and oral irritation if eaten. May cause dermatitis.
Tiger lily Lilium (Especially poisonous to cats)
Tobacco plant (leaves) Nicotiana - Harmful if eaten in quantity.
Tobira Pittosporum tobira
Tomato plant (green fruit, stem & leaves) Lycopersicon lycospersicum
Tulip Tulipa species - Harmful if eaten in quantity. May cause a skin allergy.
Umbrella plant Schlefflera species - Toxic if eaten, causing vomiting, diarrhoea.
Varnish tree Toxicodendron vernicifluum - Poisonous. Can cause severe blistering dermatitis if they come into contact with skin.
Walnut (green hull juice) Juglans nigra
Water hemlock Cicuta maculata - Violent painful convulsions. Can be fatal.
Wax tree Toxicodendron succedaneum - Poisonous. Can cause severe blistering dermatitis if they come into contact with skin.
Weeping fig Ficus species
Wild cherry tree (twigs & foliage) Prunus avium - Gasping, excitement, prostration. Can be fatal.
Windflower Anemone species - Harmful if eaten in quantity.
Wisteria (pods, seeds) Wisteria - Nausea, repeated vomiting, stomach pains, severe diarrhoea, dehydration and collapse.
Wolfsbane Aconitum septentrionale - Toxic if eaten, causing nausea and vomiting.
Woody nightshade - Toxic if eaten, causing nausea and vomiting.
Yarrow Achillea species
Yew (berries & foliage) Taxus species - Dizziness, dry mouth and mydriasis develop within one hour, followed by abdominal cramping, salivation and vomiting. Foliage is more fatal than berries, death can be sudden without warning or symptoms. Can be fatal.
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