Coordinating decorations, flowers, and cake requires clear communication between the vendors and a shared understanding of the wedding's theme and color scheme. Start by sharing your vision and any inspirational pictures with each vendor. It may be helpful to have a central point of contact, such as a wedding planner, to ensure consistency across these elements. Schedule meetings or site visits where vendors can discuss their roles and collaborate on ideas. Make sure to consider practicalities like the durability of flowers, dietary restrictions for cakes, and the installation time for decorations.