There are a number of common plants which may be toxic to dogs and cats and should be avoided. These include:

Arum lily                             Autumn crocus                                Australian Flame tree                              Avacado

Azalea                                Baneberry                                       Bird of paradise                                       Bishop’s weed

Black Laurel                       Black Locust                                   Bleeding heart                                         Bloodroot

Bluebonnet                         Blue-green algae                            Boxwood                                                  Bracken fern

Buckthorn                          Bulb flowers                                    Burdock                                                   Cacao

Camel Bush                      Caladium                                        Calla Lily                                                   Cardinal flower

Chalice                              Cherry Tree                                    Chinaberry Tree                                       Clematis

Cocklebur                          Coffee                                             Coral plant                                               Coriander

Dieffenbachia                    Tobacco                                          Yews                                                       Elderberry

Elephant ear (taro)            Eucalyptus                                      Euonymus                                               False hellebore

Flame tree                         Felt plant                                         Firethorn                                                  Four o’clock

Foxglove                           Glottidium                                        Golden Chain                                           Ground Cherry

Heaths                              Heliotrope                                        Hemlock                                                   Henbane

Holly                                  Honeysuckle                                   Horse Chestnut                                        Horsetail

Hydrangea                        English Ivy                                      Jasmine                                                    Jimsonweed

Red Maple                        Larkspur                                          Lily of the Valley                                        Easter Lily

Lupine                               Marijuana                                        Mandrake                                                  Mexican poppy

Milkweed                           Vetch                                              Yellow jasmine                                          Mistletoe

Mock orange                     Monkshood                                     Moonseed                                                 Morning Glory

Mountain Laurel                Mushrooms                                     Nightshades                                            Oak

Oleander                          Periwinkle                                        Philodendron                                            Pigweed

Poinciana                         Poinsettia                                        Poison Ivy                                                 Poison Oak

Pokeweed                        Potato Shoots                                 Privet                                                        Pyricantha

Rain Tree                         Ranunculus(Buttercup)                  Rape                                                         Lantana

Rhubarb leaves               Rhododendron                                Skunk cabbage                                         Sorrel

Snowdrop                        Spurges                                          Sweet Pea                                                Tansy

Wisteria

MOST COMMON POISONINGS include all Lilies, flower bulbs (especially Daffodils), Azaleas and Rhododendrons (cause stomach irritation, but normally have an unpleasant taste that prevents pets from ingesting them), Poinsettias, Buttercups, Dieffenbachia, and Areca Palms (a favorite chewing item of cats).

OTHER COMMON PLANT and FOOD POISONS: Grapes and raisins in large amounts can cause fatal kidney failure in dogs. Chocolate may cause siezures and death, but dogs vary a lot in their sensitivity to the caffeine-like effects of chocolate. Similarly, coffee beans should be avoided by pets. Macadamia nuts are toxic to dogs, and Avocado is poisonous to birds.  Tobacco products can also have serious effects if eaten. High-fat foods may cause dogs to develop pancreatitis or other health problems. In the vegetable garden, tomato and potato are common plants that contain harmful toxins.