Although New Zealand has an extremely small indigenous succulent flora, it more than makes up for it by having a significant number of adventive species, covering a wide spread of genera. Most were imported intentionally as garden plants, subsequently escaping into the wild. Growing conditions are often so favourable that succulents frequently spread rapidly, forming much more extensive colonies than those in their native habitats. This paper details the environmental and ecological background to the occurrence of casual and naturalised succulent plants in New Zealand together with an account of those found on a visit to the country in December 2018. A current list of all succulent plants recorded as being found in New Zealand in the wild is also included.