General symptoms of poisoning

Oral or skin irritation
Upset stomach / Vomiting / Diarrhoea
Weakness
Rapid breathing
Fever
Drooling
Coma
Heart failure
Depression
Excitability or lethargy
Tremors / Seizures / Fitting
Increased Thirst
Dilated Pupils
Dizziness / Loss of Balance
Disorientation

Plants that are most popular in gardens/home but are poisonous to dogs

Daffodil (especially the bulbs)
Castor oil bush (dogs love the seeds)
Cherry laurel (common hedging plant)
Laburnum (and related species)
Lilies / Lily of the Valley (especially toxic to cats)
Philodendron (popular ornamental house plant)
Azalea
Foxgloves
Ivy (some species)
Rhubarb
Yew
Christmas plants to avoid
Poinsettia
Mistletoe
Holly Berries
Many families include a Christmas tree as part of their holiday decorations. Some dogs and cats like to drink the tree water; the water itself is not poisonous, but if a fertilizer was added to the water it may be poisonous. This fertilizer may cause the pet to suffer with diarrhea and vomiting. It is better to try to prevent the pets from drinking tree water by keeping it covered.
More Poisonous Plants
Alfalfa (in quantity), Aloe vera, Amaryllis, Apple (seeds), Apricot (stone), Asparagus Fern, Autumn Crocus, Azalea, Baby’s Breath, Bird of Paradise, Box,Caladium, Calla Lily,CastoBean, Ceriman, Cherry (seeds and wilting leaves), Christmas Rose, Cineraria, Clematis, Cordatum, Corn Plant, Croton, Cuban Laurel, Cyclamen, Daffodil, Devil’s Ivy, Dieffenbachia, Dracaena, Dragon Tree, Elephants Ears, Emerald Fern, Foxglove, Geranium, Indian Rubber Plant, Ivy, Kalanchoe, Lily of the Valley, Lillies, Philodendron, Mother in Laws Tongue, Marijuana, Mistletoe, Morning Glory, Narcissus, Nephytis, Nightshade, Oleander, Onion, Peach (wilting leaves and stone),Pencil Cactus, Plumosa Fern, Poinsettia, Poison Ivy, Poison Oak, Pothos, Potato Plant, Primrose, Rhododendron, Swiss Cheese Plant, Tomato Plant (Green fruit, stems and leaves), Weeping Fig, Wisteria,Yew
LilliesLillies are a very popular flower and are a favourite to be included in bouquets, please be aware of giving and receiving bouquets with any poisonous flowers in them if animals will be around them. It could only take a small speck of pollen to cause a reaction. I say this from personal experience, I had no knowledge of lillies being poisonous. I had received some as a gift and placed them on the dining table. I did not know a petal had dropped to the floor and my dog, the greedy thing she is, had eaten it. A few hours later she started to shake a little, it got worse very quickly and she looked so poorly. Her eyes glazed over and her tongue and gums turned grey, she vomited the entire contents of her stomach and still shaking became very lethargic. This all happened in the space of 30 minutes, it was very scary, I had never seen her so poorly. We rushed her to the emergency vet, she asked if anything new had happened in the house, any new plants/flowers. Yes it was the lillies that caused so much painic, the vet gave her a anti-nausea injection and within hours my dog was back to her normal self. It is strange to think that one small petal caused her to be so poorly.

HouseHold Plants: Both Indoor and Outdoor

It is really important to be aware of what plants you have inside and ouside of your house. There are alot of plants that are poisonous to dogs, the severity of the poisoning varies on the plant and can cause sickness and diarrhoea with severe cases of poisoning leading to coma and death.Dogs can be poisoned by plants if they eat or even just chew part of the plant, the flower, the bulb or the plant leaves. Flowers heavy in pollen can also drop pollen onto the pet’s coat, which could then be licked off and ingested by your pet.