In most Dutch dialects / dialect groups, fi nal -n in -n can undergo various changes, of which deletion is the most prevalent. This subject has been dealt with only partially some decades ago, which has not lead to a good overall understanding of the matter: the general view back then was that -n is being left out in the central (Brabantine and Holland) and South Eastern (Limburgian) dialects, but not in the South Western (Flemish and Zeelandic) and North Eastern dialects. Though this global view is not entirely incorrect, it can now be extended and refi ned by means of relatively exhaustive dialect data from major enquiries such as the RND and GTP projects. Mainly focusing on the Southern Dutch dialects, we will try to unveil the complicated mosaic that are the restrictions for (a) -n-deletion, (b) postlexical arrangements of non-deleted -n and (c) -n-insertion. In this article it will become clear that these phenomena are conditioned by phonological as well as by grammatical conditions, and that these conditions interact on different levels.