Hosta clausa 
Hosta clausa var. normalis
1 gal pot
 
Hosta clausa var normalis is a rhizomatous Hosta, in that it does not form a compact clump, but rather a dense cover which grows quite quickly. Low to medium in size, it flowers in summer in clusters of open, dark blue-purple flowers. This subspecies tolerates non-burning or subdued sun quite well for a few hours during the day; otherwise, grow it in shade or partial shade, in cool soil, on borders, in beds or as a ground cover where it can spread out.
 
Herbaceous perennial
Partial to full shade
Zones 3-8
Prefers rich soil and plenty of water
Initially 2 ft. tall x 1 ft. wide, but expands over time