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 - Diarrhoea

Apricot (kernels) - "Prunus armeniaca" - Kernels contain cyanide. Can be fatal.

Arborvitae - "Thuja species" - Harmful if eaten in quantity. May cause a skin allergy.

Asparagus fern - "Asparagus setaceus" - Contains a wide variety of poisons resulting in a large range of symptoms.

Autumn 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.

Barilla (leaves and stems) - "Salsola soda" - causes kidney failure

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" - Severe stomach/colic like symptoms, respiratory problems

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" - Depressed heart and nervous systems, respiratory failure.

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 - "Ranunculus species" - Juice may severely injure digestive system. May also cause dermatitis.

Calla lily (leaves) - "Zantedeschia species" (as above)

Caper Spurge - "Euphorbia lathyris" - Abdominal pains diarrhoea and vomiting

Cardinal flower - "Lobelia cardinalis" - Increased salivation

Castor bean (leaves & 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" - Nausea, vomiting and diarrhoea

Cherry (kernels) - "Prunus species" - Kernels contain cyanide.

Cherry laurel - "Prunus laurocerasus" - Harmful if eaten in quantity.

Chinaberry - "Melia azedarach" - Vomiting, constipation or diarrhoea, bloody faeces, stomach pain, pulmonary congestion, cardiac arrest, rigidity, lack of coordination and general weakness.

Chinese evergreen - "Aglaonema" - Causes severe pain in the mouth

Christmas rose (leaves, roots) Helleborus niger - Harmful if eaten in quantity.

Chrysanthemum (leaves & stems) - "Chrysanthemum species" - May cause dermatitis.

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" - Vomiting (occasionally with blood), depression, anorexia, hypersalivation

Crocus - "Anemone species" - very poisonous - nausea, vomiting, diarrhoea, raised blood pressure, respiratory failure, 

Crown vetch - "Coronilla varia" - skin lesions, staggering, digestive disturbance

Cuckoo pint - "Arum maculatum" - Toxic if eaten, causing nausea and vomiting. May cause a skin allergy.

Crowfoot - "Anunculus species" - gastro-enteritis

Cycads - "Encephalartos species" - neurotoxic symptoms

Cyclamen species - Gastrointestinal tract affected. Convulsions and paralysis.

Daphne species - Gastrointestinal tract and kidneys affected. May cause dermatitis.

Datura Brugmansia species - Hyperthermia; tachycardia, hallucinations

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 species - Causes diarrhoea 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.

Echium species - Harmful if eaten in quantity. May cause a skin allergy.

Elder (leaves, root, bark) - "Sambuccus species"

Elderberry - "Sambuccus 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.

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.

Fruit salad plant - "Philodendron" - Diarrhoea, burnt mouth, dermatitis

Monstera deliciosa - Causes diarrhoea and oral irritation if eaten. May cause dermatitis.

German ivy (berries and leaves) - Gastrointestinal disturbance

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.

Hellebores - "Helleborus species" - Cardiac, Gastroenteric, Neurological effects

Heliotrope - "Heliotropum arborescens" - Digestive upset, liver damage

Hemlock - "Tsuga species" Henbane Hyposcyamus niger - Toxic if eaten, causing nausea and vomiting.

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 species - Nausea, vomiting, diarrhoea, skin irritation

Ivy (entire plant) - "Hedera helix" - Harmful if eaten in quantity.

Japanese spindle - "Euonymus sieboldianus" - Harmful if eaten in quantity.

Japanese yew - "Taxus species" - Digestive upset, cardiac arrest, can be fatal.

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" - Nausea, vomiting, salivation & diarrhoea

Kale Brassica oleracea - Haemolytic anaemia, goitre, possible reduced fertility

Kingcup Caltha palustris - Harmful if eaten in quantity.

Lantana camara - Toxic if eaten, causing nausea and vomiting.

Larkspur (young plants & seeds) - Digestive upset, nervous excitement, depression, respiratory failure, can be fatal.

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) - Slow pulse, diorhea, vomitting, tummy ache, low blood pressure, cardiac issues.

Convallaria species - Toxic if eaten, causing nausea and vomiting.

Lily of the valley bush - "Pieris japonica" 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.

Maple Tree - "Acer species" - Damage to red blood cells, jaundice

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 - Diarrhoea, vomiting, nausea, temporary blindness, burning mouth, skin/eye irritation, delirium.

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.

Narcissus (bulbs) - Nausea, vomiting, diarrhoea. May cause dermatitis. Can be fatal.

Needlepoint ivy (berries and leaves) - Gastrointestinal tract affected. May cause dermatitis.

Nerine bowdenii - "Nightshades Solanum species" - Intense digestive disturbances. Can be fatal.

Oleander Nerium - "Oleander" - Affects the heart, produces severe digestive upset, extremely poisonous. May cause dermatitis. Can be fatal.

Onion - "Allium species" - Causes anaemia. - Onions should not be fed to dogs in any form.

Pasque flower - "Pulsatilla vulgaris" - Harmful if eaten in quantity.

Peace lily - "Spathiphyllum species" - Gastrointestinal tract affected. May cause dermatitis.

Peach (stones & leaves) - "Prunus persica" - Contains cyanide.

Pencil cactus - "Opuntia leptocaulis"  (roots) - Hallucinogenic

Peruvian lily - "Chlidanthus fragans" - Harmful if eaten in quantity. May cause a skin allergy.

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" - Diarrhoea, 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" - Vomiting & diarrhoea

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.

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 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.

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" - Gastroenteritis

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" - Hepatitis

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.

Tiger lily - "Lilium" (Especially poisonous to cats)

Tobacco plant (leaves) - "Nicotiana" - Harmful if eaten in quantity.

Tobira Pittosporum tobira Tomato plant (green fruit, stem and leaves) Lycopersicon lycospersicum

Tulip - "Tulipa species" - Harmful if eaten in quantity. May cause a skin allergy.

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.

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.