The Poison Garden Plants. Poisonous plants from the garden of alnwick. There are some 40 poisonous plants in the garden, including poison ivy (toxicodendron radicans), water hemlock (cicuta maculata) and poison sumac (toxicodendron vernix).ricin or castor bean (ricinus communis) is a popular garden annual and a medicinal plant (remember castor oil), but also contains a deadly poison.photo:

Contains 38 different cardiac glycosides. The information divided into 3 sections: Water hemlock is one of the most toxic plants in nature.

It gives all sumac shrubs a bad name, despite the fact that most are quite harmless and beautiful in fall.

Due to the plants’ dangerous qualities, visitors are prohibited from smelling, touching or tasting any of them. Most toxic garden plants, such as granny’s bonnet, bluebells and hellebores, need to be eaten in such huge quantities to cause harm, that they’re very. The garden is separated from the rest of the alnwick gardens property by strong iron gates that bear the skull and crossbones sign, signalling the lethal and hazardous nature of what lies beyond the gates. The alnwick garden plays host to the small but deadly poison garden—filled exclusively with around 100 toxic, intoxicating, and narcotic plants.