Deadheading your daisy plants can extend their bloom time and give you a second round of flowering. Daisies bloom in the summer, and will keep flowering until fall with proper upkeep. The best time to deadhead each flower occurs before it has died back completely, so deadhead your flowers as the blooms begin to fade.
Deadheading daisy flowers is simple--you need only remove the bud and petals. While some gardeners pinch off daisy blooms, the best results come from using sharp scissors or clippers, to avoid pulling or damaging the stem. If your blooms have died back significantly, cut them down to the point where the stem splits from each other.