Dogs and cats can be very interested in your plants and their surroundings. If you have a dog that likes to eat EVERYTHING, use this list as a resource for what is poisonous. However, when in doubt contact your local vet or poison control center.
Though not all plants are fatal, some can cause severe digestive problems, pain and discomfort. Some plant parts are non-toxic, while other parts on the same plant are toxic. Also, many plants within a certain family may be toxic, so if you know that one plant in a family is poisonous, be especilly cautious with other plants in that same family. Listed below are common plants that are poisonous.
| Common Name | Botanical Name | Poisonous Parts |
| Anemone, Pasque Flower | Anemone spp. | |
| Baby’s Breath | Gypsopilia paniculata | |
| Baneberry, snakeberry | Actaea spp. | berries, roots, foliage |
| Barberry | Berberis vulgaris | berrie, roots, foliage |
| Birds Foot trefoil | Lotus corniculatus | |
| Bitterweed | Hymenoxys sp | |
| Black Locust | Robinia pseudoacacia | |
| Bleeding Heart | Dicentra spectabilis | foliage |
| Blood Root | Sanguinaria canadensis | red sap |
| Boxwood | Buxus sempervirens | foliage |
| Buckeye, Horse Chestnut | Aesculus spp. | |
| Buckwheat | Fagopyrum sp | all parts except seeds |
| Burning Bush | Euonymus alatas | |
| Buttercup | Ranunculus sp | all parts |
| Carnation | Dianthus spp. | |
| Castor Bean | Ricinus ommunis | seeds |
| Chinese Lantern | Physalis sp | |
| Clematis | Clematis spp. | |
| Clover | Trifolium spp. | roots |
| Cocklebur | Xanthium spp. | |
| Columbine | Aquilegia vulgaris | |
| Coralberry, snowberry | Symphorcarpos spp. | |
| Cotoneaster | Cotoneaster salicifolius | berries |
| Cowslip | Caltha palustris | |
| Crocus | Colchicum sp | |
| Crown Vetch | Coronilla varia | |
| Daffodil | Narcissus spp. | bulbs |
| Dahlia | Dahila spp. | |
| Daphne | Daphne spp | berries, bark, leaves |
| Delphinium | Delphinium sp | |
| Elderberry | Sambucus canadensis | berries |
| False Indigo | Baptistia spp. | |
| Fiddleneck | Amsinckia intermedia | all parts |
| Fig Wort | Scrophularia sp | |
| Flax | Linum usitatissimum | |
| Four o’clock | Mirabilis jalapa | |
| Foxglove | Digitalis sp. | leaves, seeds, and flowers |
| Fritillaria | Fritillaria collina | bulbs |
| Goldenrod | Solidago sempervirens | |
| Hairy Vetch | Vicia spp. | |
| Helioptrope | Heliotropium arborescens | |
| Hellebore | Helleborous niger | leaves, stems, berries, roots |
| Hemlock | Coniu maculatum | All parts, root and root stalk |
| Holly | Illex spp | fruit |
| Horestail | Equisetum arvense | |
| Hydrangea | Hydrangea macrophylla | leaves, bulbs |
| Iris | Iris spp | underground stems, blubs |
| Joe Pye Weed | Eupatorium rugosum | |
| Kentucky Coffee Tree | Gymnocladus dioicus | |
| Lantana | Lantana | all parts, use caution |
| Larkspur | Delphinium so. | young plants and seeds |
| Leopards bane | Arnica montana | |
| Lily | Lilium sp. | leaves, flowers |
| Lily-of-the-Valley | Convallaria majalis | leaves, flowers |
| Lobelia | Lobelia sp. | |
| Loco Weed | Astragalus spp/Oxytropis sp. | all parts |
| Jimson Weed | Detura stramonium | all parts |
| Lupine | Lupinus app. | |
| Maiden Grass | Miscanthus sinensis | roots |
| Mandrake-Mayapple | Podophyllum peltatum | roots, foliage, unripe fruit |
| Yarrow | Achillea millefolium | |
| Milkweed | Asclepias spp | |
| Mistletoe | Phoradendron serotinum | berries |
| Monkshood | Acontitum sp | all parts |
| Morning Glory | Ipomoea sp. | seeds |
| Mountain Laurel | Kalmia | |
| Mescal Bean | Sophoria secundiflora | |
| Nettle | Urtica spp. | |
| Nightshade, Bittersweet | Atropa sp./Solanium sp. | All parts |
| Oak | Quercus spp. | |
| Oleander | Norium Oleander | All parts, including dry leaves |
| Periwinkle | Vinca sp | |
| Pigweed | Amaranthus spp. | |
| Pokeweed, Inkberry | Phytolacca americanan | all parts |
| Ponderosa Pine | Pinus ponderosa | sap |
| Poppy | Papaver sp | all parts exept seeds |
| Porcelain Berry | Ampleopsis spp. | |
| Prickly Copperweed | Oxytenia acerosa | |
| Princess Plume | Stanleya pinnata | |
| Privet | Ligustrum sp. | berries |
| Queen Annes Lace | Daucus carota | |
| Ragweed | Ambrosia sp. | pollen |
| Ragwort, Groundsel | Senecio sp. | |
| Red Maple | Acer rubrum | |
| Rhododendron-Azalea | Rhododendrun sp. | all parts |
| Rhubarb | Rheum raponticum | leaf blades |
| Rue, Bittersweet | Ruta graveolens | |
| Scotch Broom | cystisus scoparius | |
| Sedum Stonecrop | Sedum | all parts |
| Snakeweed | Gutierrezia microcephala | |
| Sneezweed | Helenium microcephalum | |
| Snow on the mountain | Euphorbia maculata | |
| Snowdrops | Galanthus elswesii | |
| Soapwort | Saponaria spp. | |
| Solomons Seal | Polygonatum spp. | |
| St Johns Wort | Hypericum perforatum | leaves |
| Sweet Clover | Melilotus spp. | |
| Sweet Pea | Lathyrus odoratus | seeds, pods |
| Tansy | Tanacetum sp | |
| Thorn apple-Angels trumpet | Datura innoxia | all parts |
| Tobacco | Nicotiana spp | |
| Trillium | Trillium so. | |
| Tulip | Tulipa | bulbs |
| Viginia Creeper-Boston Ivy | Parthenocissus quinquefloia | all parts |
| Wild Cherries | Prunus sp. | leaves, seeds, stems, bark |
| Wisteria | Wisteria sp | seeds, pods |
| Wormwood | Artemsia absinthium | |
| Yellow Star Thistle | Cenaurea solstitalis | |
| Yew | Taxus canadensis | all parts |
