The plants listed on this page are poisonous. We've
created this special index as a public service to perennial
gardeners around the world. We do not want to sound
alarmist, but the fact is, many ornamental plants are
poisonous to some extent.
Most home gardens contain at least some toxic or
poisonous plants. Some of the most popular ornamentals
are toxic, including shrubs like Rhododendrons and
Hydrangeas, trees like Horse-chestnut and Holly, house
plants such as Dieffenbachia and Croton, and other
perennials and annuals as well.
Removing every single poisonous plant from your garden
may not be truly necessary. We recommend that you side
with caution. For more information, please refer to the Canadian Poisonous Plants Information System.
Here is our list, click on the name for more details.