Cluster flowers are a type of floral arrangement where multiple individual flowers grow closely together on a single stem. This growth pattern can create a dense and visually striking display, often seen in various species such as hydrangeas and lilacs. The clusters can vary in size, shape, and color, making them popular in gardens and floral arrangements. These flowers can attract pollinators like bees and butterflies, as the concentrated blooms provide a rich source of nectar. Cluster flowers are also beneficial for gardeners, as they can create a vibrant focal point and enhance the overall aesthetic of a landscape.