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Not all plants require pruning in the fall, as improper cutting can hinder spring blooming and weaken their frost resistance. Certain flowers and shrubs, like roses and azaleas, form buds before winter, making fall pruning detrimental. Leaving dried stems and leaves can protect plants from cold and provide habitat for wildlife. Specific plants, such as sunflowers and echinacea, can benefit from being left unpruned for winter. Timing is crucial; many plants should be pruned in spring after the risk of frost has passed to ensure healthy growth and flowering.