| Common Name | Botanical Name | Details |
| False Hellebore (roots, seeds & leaves) | Veratrum album | Toxic if eaten, causing nausea and vomiting. |
| Flannel Flower | Phylica plumosa | Harmful if eaten in quantity. |
| Flax | Linum usitatissimum | Toxic if eaten in quantity. |
| Foxglove | Digitalis species | Toxic if eaten, causing nausea and vomiting. |
| Fruit Salad Pland | Monstera deliciosa | Causes diarrhea and oral irritation if eaten. May cause dermatitis. |
| Gaultheria | Gaultheria mucronata | Harmful if eaten in quantity. |
| German Ivey (berries & leaves) | Delairea odorata | Gastrointestinal tract affected. May cause dermatits. |
| German Primula | Toxic if eaten. May cause a skin allergy. | |
| Glory Lily | Gloriosa superba | Toxic if eaten. May cause a skin allergy. |
| Golden Chain (seed capsules) | Laburnum | Toxic if eaten, causing nausea and vomiting. |
| Granny's Bonnets | Aquilegia vulgaris | Harmful if eaten in quantity. |
| Henbane | Hyposcyamus | Toxic if eaten, causing nausea and vomiting. |
| Hibiscus | Hibiscus species | |
| Holly (berries) | Ilex species | Upset stomach, tremors, seizures, loss of balance. |
| Horse Chestnut (nuts, leaves) | Aesculus hippocastanum | Harmful if eaten in quantity. |
| Hurricane Plant (bulb) | Monstera deliciosa | Varied toxic effects. Causes diarrhea and oral irritation is ewaten. May cause dermatitis. |
| Iris (roots) | Iris species | Severe digestive upset. May cause dermatitis. |
| Ivy (entire plant) | Hedera helix | Harmful if eaten in quantity. |
| Jack In The Pulpit | Arisaema species | Causes burning to the mouth. Can cause hallucinations. |
| Japanese Spindle | Euonimus sieboldianus | Harmful if eaten in quantity. |
| Jessamine (berries & sap) | Cestrum species | Digestive disturbance. Gastrointestinal tract and nervous system affected. Can Be Fatal |
| Jerusalem Cherry (immature growths) | Solanum pseudocapsicum | Gastrointestinal tract affected. May cause dermatitis. |
| Jimson Weed (Thorn Apple) | Datura stramonium | Abnormal thirst, distorted sight, delirium, incoherence, coma. Can Be Fatal |
| Kalanchoe | Kalanchoe species | Depression, rapid breathing, teeth grinding, ataxia, paralysis. |
