Garden flowers and plants that can kill your pet are Poinsettia (or the Christmas plant), Rhododendron, Lilies, Daffodil bulbs. and Yew which is used in hedges and topiary. The vegetable patch can also be no safer with onion, garlic, leek and chives (all from the allium family) being toxic to household pets.
Poinsettia affects dogs, and cats and the symptoms are diarrohea, delirium and blindness.
Lilies (or the pollen) affects cats and the symptoms are kidney failure.
Daffodil bulbs affects both dogs and cats and then symptoms are vomiting and diarrhoea.
Rhododendron affects both dogs and cats and symptoms are vomiting, drooling, low blood pressure and coma.
If you know your pet explores the world through its mouth the best is to avoid bringing these plants into your home or your garden.