Divergence time estimation analyses are nearly ubiquitous in phylogenetic manuscripts. Chronograms play a key role in placing biological systems into a broader evolutionary context by facilitating comparisons to other evolutionary lineages, geologic and geographic movements, and local and global climatological changes. They are also a vital source of information for many comparative analyses, such those that track diversity dynamics through time (interpreted from changes in rates of speciation and/or extinction) and those that attempt to uncover the tempo and mode of morphological evolution. However, it is clear that we are getting no closer to accurate divergence times for major radiations. In this talk, I will discuss several of the problems we continue to face and the challenges that lay ahead in our quest to better understand divergence times across plants.