When should I cut my canna lilies back to ensure their health and vibrancy in the next growing season? As these stunning, tropical perennials possess such enchanting foliage and striking blooms, I find myself pondering the optimal timing for this essential maintenance task. Is it best to prune them immediately after the first frost, when the foliage begins to wither, or should I wait until the plant shows signs of dormancy? Furthermore, how does the geographical location influence the timing of this pruning? In colder regions, does one need to be more vigilant in managing their canna lilies compared to those in warmer climates? Could it be that a late winter or early spring clean-up yields an even more resplendent garden display? With so many variables to consider, I wonder: what are the experts’ insights on this cutting conundrum that could ultimately impact the flourishing future of my canna lilies?