Answer: Mums are typically pinched back repeatedly, beginning when they are only about four inches high and continuing until about the fourth of July. This procedure delays their flowering until fall and at the same time makes them dense and bushy. In some cases, it is possible to enjoy their spring bloom and then cut them back and fertilize them to encourage a second flush of bloom in the fall. Since they have already devoted energy to forming the buds, you might as well enjoy the blooms now.
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