Notice how deep this flower head is and how it is tucked in between rose heads.
Do this on different areas. It will create more depth and interest to the design.
You can see the carnation heads and placements and how they are filing in to come close to a completed design.
The final carnations give more interest and texture to the final design.
Don't feel like you have to use every single flower and pack the flowers so tightly that the flowers don't have some space between them. You want that lovely Dusty Miller foliage leaves to peek through the open spaces.
Note the differences in the depth and the varied length of the flower heads.
I'm going to add a couple stems of snapdragons cut into shorter pieces, again . . for a little added interest since the colors of the flowers are all a soft white.