What is one common mistake to avoid when wiring flowers?

Over-wiring is a common mistake to avoid when wiring flowers because it can result in a stiff and unnatural appearance. When flowers are over-wired, the stems become rigid and may not present the natural grace and softness that floral arrangements typically require. This can detract from the overall aesthetic of the arrangement, making the flowers look more like constructed objects rather than natural blooms. A well-done wiring should enhance the flower's form and allow for a balanced presentation, while over-wiring tends to overshadow these delicate attributes.

The other options address different aspects of care and technique. Using insufficient wire may fail to secure the flower adequately, while the concern of too much water relates more to the longevity and health of the flower than to wiring technique. Lastly, wiring flowers without leaves is not typically a mistake, as many arrangements focus solely on the blooms. Therefore, the emphasis is rightly placed on the importance of not over-wiring for achieving a natural, beautiful look in floral designs.