The level of toxicity in plants ranges from being deadly, to causing stomach pains to mild rashes and mouth ulcers. Signs that your dog may have eaten something toxic can vary, but look out for irritation to the mouth or skin, lethargy and lack of appetite. Vomiting, convulsions and spasms will require emergency veterinary care.
Puppies up to the age of about 18 months are better off kept fenced away from most garden areas. This protects both the dog and the garden. Indoor plants should also be kept out of reach of dogs.
Dogs can be discouraged from chewing on plants by giving them plenty of other more appropriate things to chew on such as bones, ropes and chew toys.
Toxic plants include:
Agapanthus roots, Aloe, Arum Lily, Asparagus fern, Avocado, Azalea
Bird of Paradise
Caladium, Cape Lilac, Clematis, Cycads
Daffodils, Daphne
Foxgloves, Frangipani
Gladioli
Hellebore, Hyacinth, Hydrangea
Ivy
Jonquil
Lantana, Lily, Lily of the Valley, Lobelia
Fruit Salad Plant
Morning Glory
Nightshade
Oleander, Ornamental chilli
Philodendron, Poinsettia
Rhododendron
Sweet Pea
Tomato Plants, Tulip
Umbrella Plant
Wisteria
Yucca
This isn’t a comprehensive list, so you should always do some research before planting anything in your garden if you own a dog or are planning to in the future.