Plant restrictions tend to be related to noxious weeds rather than poisonous plants. There are a lot of common poisonous plants. Heck, you can even grow castor beans. My local government is fond of using them in town garden plots. Castor beans ar... read more
"Nerium oleander flowers leaves" by Alvesgaspar - Own work. Licensed under CC BY 2.5 via Wikimedia Commons - File:Nerium oleander flowers leaves.jpg Using a poisonous plant or flower to injure or kill someone is illegal, whether from your garden or picked from the wild. read more
In some places, it is not illegal to grow cannabis plants. The laws vary from locality to locality. If we weren't"legally" allowed to grow poisonous plants, we would have much less diversity in our landscapes. Many plants are toxic, in different amounts, in different ways, to different creatures. read more
Daffodils are one of the first plants that blossom in your garden without fear of the late spring frost. However, if the bouquet of daffodils stays for too long in a room, people start getting headaches. In fact, different parts of the plant are mildly poisonous. read more