What would cause a rose of Sharon not to bloom?

A rose of Sharon may not bloom due to several factors, including insufficient sunlight, as they require full sun for optimal flowering. Poor soil conditions, such as low nutrient levels or improper pH, can also hinder blooming. Additionally, excessive pruning or frost damage can impact flower production, as well as watering issues like drought stress or overwatering. Lastly, the plant may be too young or recently transplanted, needing time to establish before producing blooms.