When should I fertilize hydrangeas to ensure they thrive and produce vibrant blooms? Is there a particular time of year that is more advantageous than others? As these enchanting flowers often captivate gardeners with their luscious, rounded heads of color, it becomes imperative to understand their nutritional needs. But does the answer differ based on the specific variety of hydrangea? Are there climatic conditions or regional differences that could influence the timing of fertilization? How does the age of the plant factor into this equation? Should a younger hydrangea receive a different approach to fertilization compared to a mature one? Moreover, what types of fertilizers should be used, and how do they affect the blooming cycle? Should one consider both granular and liquid options? And finally, can the application frequency vary, and if so, how often should one revisit this crucial aspect of hydrangea care for optimal growth?