Zeolites are nanoporous materials with a myriad of applications in catalysis and separations. Thanks to a broad diversity in topology and composition, their shape selectivity can be tuned along with their thermal stability and catalytic activity. While the complex polymorphism observed in zeolites is key to creating tailored nanoporous materials for targeted applications, it hinders synthesis efforts due to phase competition between different metastable structures. Often, crystallizing a desired framework requires labor-intensive optimization of synthesis conditions to overcome the nucleation and growth of competing phases.