What distinguishes dish gardens from floral arrangements?

Dish gardens are distinct from floral arrangements primarily because they are designed to contain living plants that will continue to grow and change over time. This characteristic allows them to evolve as the plants mature, adapting in terms of size, shape, and even color as they develop. This dynamic nature sets dish gardens apart from floral arrangements, which typically consist of cut flowers that, while beautiful, do not grow or change after being cut.

In contrast, other factors such as requiring soil and water are certainly true but do not encapsulate the primary distinction in the same way as the growth aspect does. While dish gardens can include a variety of plants, including succulents and even flowering varieties, the defining feature is their ongoing life cycle. Thus, the correct answer showcases how dish gardens are meant to be more than just a one-time decorative display; they're living arrangements that will flourish with proper care.