7 most common and poisonous plants in gardens

The Castor oil plant – Ricinus communis

The Castor oil plant is found all over the Mediterranean region and is particularly toxic to humans and animals. All parts of the plant are dangerous. However, the flowers at the top contain little pods, there are three seeds within each pod, these seeds are particularly lethal, containing high concentrations of Ricin.
According to the Guinness Book of World Records (1997 edition) this plant is the most poisonous in the world.

Angel’s Trumpets – Datura

Another common sight across Spain are Angel’s Trumpets, commonly known as Datura. A beautiful plant with white or pink flowers.
The seeds and leaves are the most toxic part, although, most parts of the plants contain toxics.
Datura plants contain tropane alkaloids, children are particularly vulnerable to this kind of poison and the prognosis is often fatal.

The Calla Lily – Zantedeschia

A very common plant found throughout the Mediterranean and all over Spain. Originally from South Africa. It is an exceptional beautiful plant that flowers in late winter or early Spring, then dies down until the following year.

Its leaves are toxic. When in contact with skin, eyes or lips will cause a nasty burn or irritation.

Adelfa – Nerium oleander

Being particular drought resistant, Adelfa is found throughout Spain.
The flowers can be red, white, pink or yellow. All parts of the plant are highly toxic and particular care should be taken when pruning as the sap is particularly dangerous.

Wisteria - Fabaceae

Extremely popular as ornamental plants across Asia, Wisteria is ideally suited to the Mediterranean climate. All parts of the plant are toxic if consumed, but, the pods and the seeds are the most dangerous parts.

Lantana – Verbenaceae

The Lantana plants are drought resistant and extremely colourful, with a mix of orange, red, yellow, blue and white florets.

The berries and leaves are toxic. Less so, than some of the other plants listed above. But they are still classified as hepatogenic.

Poinsettia – Euphorbia pulcherrima

Known across Spain as the ‘Estrella de Navidad – Christmas Star,’ no Spanish home is complete without one over Christmas time.

All parts of the plant are mildly toxic with white sap being slightly more dangerous.

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