Remove any dead, diseased or bedraggled foliage and discard it. As the season progresses, sunflowers have a tendency to become untidy looking. Clean them up with a quick pruning.
Lift up low-lying foliage for a better view, and pinch off the flower heads at the tops of the plants. Pinching these flower buds off between your fingers encourages more blooms and a compact, bushy form. You may have to work on your hands and knees to access small plants.
Cut dwarf sunflower stems at least 8 inches long for cut flower arrangements using a sharp knife or pruning shears. Place them immediately in warm water. Allow them to rest in the warm water for two hours before arranging them in a vase filled with cold water and a floral preservative. Store the flowers out of direct sunlight and change the water every 2 to 3 days.