Repotting is probably the single most important and significant technique involved in the successful cultivation of bonsai trees.
Not only is autumn repotting possible here in New Zealand, but in some cases recommended.
Trees that flower in late winter or early spring, as well as evidence to support native tree repotting.
Hardy conifers can also do well, and fast growing varieties like willow and privet.
However the important difference from springtime root pruning is to cut less and do not overwater. Be careful in positioning the tree in display after repotting and watch the temperature. Basically aftercare is crucial.