Answer: In general, deadheading is removing the flowering stem from the plant. If you just remove the spent blossom, you'll end up with a dead stem; nothing else will grow on that stem. On some plants, such as geraniums, you can snap off the entire flowering stem where it attaches to the rest of the plant; with other plants, you'll need to cut the flowering stem back to a set of leaves (roses, for instance). Hope this clarifies things for you!
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