Which flower type should not be used in masculine designs due to its delicate nature?

Filler flowers are often characterized by their lighter, more delicate appearance. They are typically used to fill in gaps within arrangements and add texture, without being the focal point. Because of their soft and airy qualities, they may not convey the robust, solid aesthetic often sought in masculine floral designs.

In contrast, other types of flowers like line, mass, and form flowers are generally bolder and have a stronger structural presence, making them more suited for designs intended to evoke a sense of masculinity. Line flowers have straight stems and create height, mass flowers provide fullness and can have a more substantial build, and form flowers are usually sculptural and striking in shape, all of which contribute to a more masculine silhouette. Thus, filler flowers' delicate nature makes them less appropriate for masculine floral compositions.