Answer: Deadheading is the removal of spent blooms to stop seed production and to encourage branching and the development of additional flowers. You can pinch or cut off dead flowers, and in some cases, the entire flowering stem, depending upon the plant. For instance, you can pinch off faded marigolds or petunia flowers and cut off faded roses. For spike flowers, such as delphiniums, it's easier to simply cut the entire flowering stalk down to foliage level when the flowers are spent rather than removing each individual flower on the spike.
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