Connectives such as however and since play an important role for marking coherence relations in discourse and therefore are crucial for reading comprehension, which in turn is a strong predictor of academic success. Most research on the acquisition of connectives targeted younger children. Yet there is evidence that connective development extends well into adolescence and even adult speakers have difficulties with some coherence relations when they are conveyed by infrequent connectives bound to the written mode. In this paper, we tested the use of connectives encoding different coherence relations and bound to either the oral or the written modes. We studied the performance of native French-speaking teenagers (N = 154, M age = 14.43, range: 12–19) in a cloze task and also assessed whether teenagers’ vocabulary level and degree of exposure to print predicted the accuracy of connective use. Our findings show that the ability to use connectives appropriately increases with age. However, age played a lesser role compared to vocabulary knowledge and degree of exposure to print, thus indicating that lexicon size and reading habits are important factors explaining individual differences in the acquisition of connectives.