The most hardy and reliable variety for bonsai are members of the Fuchsia magellanica species. Try to avoid variegated forms as they are weaker and have a tendency to revert in poor light. In the following notes I will be referring to F.Magellanica specifically though other varieties should be cultivated in much the same way, as long as care is taken with differing frost hardiness. Fuchsias are suited to informal upright and cascade styles in small to medium sizes. Fuchsia hardiness is variable depending on particular species.
Specimens do require a dormancy otherwise they lose their vigour.
It is advisable to leave trees outside until the first frosts of the Autumn and then move to a light, frost-free position for the remainder of the winter. This can result in plants not exhibiting growth until as late as May or June in cooler climates. Plants not showing new growth until this time should not be regarded as having died. Use a basic soil mix. As Fuchsia produce flower buds on a continual basis throughout the growing season, maintenance pruning will not affect flower numbers significantly.