Many of the most widespread and dangerous invasive alien species have been imported in our country for ornamental purposes but then, escape from cultivation, they spread to the natural environment causing enormous damage! if you like gardening take care to know the plants you grow. if it is an invasive alien species, follow some simple good practices to avoid their spread in nature, such as: keep them in a confined environment and dispose of pruning residues appropriately. adopt the same good practices in case of exchanges of seeds and seedlings with other collectors or enthusiasts. always prefer native plants and ask your nursery to advice you in your choice. the native species have many advantages: they adapt better to local climatic conditions and often require little maintenance.