This study explores the development of multiple dimensions of linguistic complexity in the writing of beginning learners of German both as a group and as individuals. The data come from an annotated, longitudinal learner corpus. The development of lexicogrammatical complexity is explored at 2 intersections: (a) between cross-sectional trendlines and the individual development paths of 2 focal learners and (b) between different complexity variables. The study contributes to the empirical body of linguistic complexity research by close tracking of beginning learners over 4 semesters of collegiate study of German as a second language (L2). For this purpose, data for multiple variables were collected at dense time intervals using multiple waves, and correlation analysis between various datasets was performed. The results confirm some general developmental trends established in previous research. However, the study also found significant variability between individual and cross-sectional data. Furthermore, differences found for more specific complexity measures between this study's results and previous research are explained in terms of differences in instructional approaches. In addition, the study contributes to the discussion of methods and metrics appropriate for tracking the development of complexity in foreign language writing. The study concludes with implications for L2 pedagogy and further research, including applications of computational methods. (Contains 8 notes, 3 tables and 6 figures.)