What criteria must vegetation meet to be considered established?

To consider vegetation as established, it must provide uniform ground cover and inhibit erosion. This criterion is crucial in the context of stormwater management, as established vegetation plays a significant role in controlling runoff, stabilizing soil, and reducing erosion. When vegetation uniformly covers the ground, it helps to absorb rainfall and filter stormwater, reducing the velocity and volume of runoff that could lead to erosion and sedimentation issues. Additionally, established plants create a protective layer over the soil, which enhances its stability and supports the overall health of the ecosystem.

While visual appeal and flowering are secondary benefits of vegetation, they do not directly address the essential functions necessary for effective erosion control and soil stabilization. Similarly, while quick water absorption can be beneficial, the primary focus in determining if vegetation is established lies in its ability to provide ground cover and prevent erosion. Thus, the correct answer reflects the primary ecological functions that established vegetation must fulfill in stormwater management practices.