You may see beautiful pink dahlias, but there are some brown passed blossoms. To promote the dahlia to bloom more, it require some trimming. This technique is called “dead heading.” This simple pinching technique is used to discard older blooms that have passed. You can use your fingers to gently pinch off older blooms, or if you prefer to cut the dead materials you can use floral snips.
The best way to dead head summer blooming bulbs is to cut the old blossoms close to the newest growth of the plant. By trimming out the old blossoms, it tells the plant to stop sending energy to the dead blossom and it will promote new buds to appear. Therefore creating the allusion that you have endless blooms!
Dahlias, begonias, cannas and callas are examples of summer blooming bulbs that require dead heading.