In medieval cosmology, the sump was the center of the cosmos, where the dregs and filth descended, with the celestial sphere far exalted above the world of fallen man.
Asters, ageratum, balsam, begonia, petunia, pansy, phlox, cosmos, zinnia and perennial flowers like salvia, delphinium, larkspur, and dahlia are the main attraction in this garden.
