When should I divide hostas to achieve optimal growth and vitality? Is there a specific time of year that is most advantageous for performing this task? Given the diverse climates and growing conditions, might the ideal timing vary considerably? For instance, is it more beneficial to undertake this division in the early spring when new shoots are emerging, or would late summer or early fall provide a more conducive environment for the plants to recover? Furthermore, what signs should one look for to determine the readiness of hostas for division? Should the size of the plant, the density of growth, or perhaps even the health of the foliage influence this decision? Are there certain varieties of hostas that thrive more readily after being divided, while others might struggle? Ultimately, what factors should be weighed before deciding on this crucial horticultural intervention that can significantly impact the aesthetic and health of these beloved garden staples?