Toxic Plants for Dogs: A UK Walker's Guide

Common Toxic Plants on UK Walks

Many plants found on British walks are toxic to dogs if ingested. While most dogs learn to avoid bitter-tasting plants, puppies and curious dogs may sample anything. Knowing what to watch for can prevent a frightening emergency.

Foxglove (Digitalis) is found throughout the UK on woodland edges and hedgerows. All parts are toxic, containing cardiac glycosides that can cause heart failure. Yew (Taxus) is another severe danger, found in churchyards, hedgerows and gardens. Ingestion of even small amounts of yew can be fatal.

Seasonal Dangers

Spring brings bluebells, daffodils and crocuses, all of which are toxic. Daffodil bulbs are the most dangerous part. Summer brings giant hogweed (causes severe skin burns from sap) and hemlock water dropwort (one of the UK's most poisonous plants, found near water).

Autumn brings conkers (horse chestnuts, toxic if chewed), acorns (contain tannins that damage kidneys in large quantities) and fungi (many species are toxic, some fatally). Winter brings holly berries and mistletoe, both mildly toxic.

Blue-Green Algae

Cyanobacteria (blue-green algae) is not a plant but deserves special mention. It appears on still or slow-moving freshwater during warm months, forming green scum or flakes on the surface. Ingestion can be fatal within hours.

Never let your dog swim in or drink from water with visible algae bloom. If your dog comes into contact with suspected blue-green algae, wash them immediately and seek emergency veterinary care.

What to Do If Your Dog Eats Something Toxic

Stay calm and act quickly. Remove any remaining plant material from your dog's mouth. Note the plant and take a sample or photo if possible. Contact your vet or the Animal Poison Line (01202 509000) immediately.

Do not attempt to make your dog vomit unless specifically instructed by a vet. Some substances cause more damage coming back up. Time is critical with most poisonings, so do not wait for symptoms to develop before seeking help.

Dog-Safe Plants to Know

Not everything is dangerous. Clover, dandelions, grass (in moderation), chamomile and lavender are all safe if your dog nibbles. Hawthorn berries, blackberries and rosehips are safe to eat and many dogs enjoy them.