Hosta Twin Cities will form a substantial mound, reaching 55cm to 60cm in height and spreading up to 125cm at maturity.  It is a reverse-coloured sport of Hosta St Paul. The leaves emerge blue green with a faint chartreuse margin that brightens over the summer, potentially turning a vibrant yellow with sufficient sunlight. As the plant matures, the foliage exhibits notable corrugation. Light lavender flowers bloom atop scapes reaching up to 100cm tall in early summer. This Hosta is slug resistant.