The basic requirements for this group of species is similar to those of their British counterparts. The main difference is that many of the continental species and hybrids are intolerant to the winter wet experienced in Britain. It is therefore necessary to provide some sort of winter protection both from rain and, in some cases, frost.

Even though the mountain species grow in areas which suffer very cold weather in the winter most will actually be under the snow thus gaining protection from frost.

Full details for each genus can be found under other cultural note headings.