Hosta ventricosa aka Blue Plantain Lily

Hosta ventricosa is a deciduous perennial in the asparagus family. It comes from China; Missouri Botanical Garden also lists North Korea. It grows in woods, on grassy slopes, and beside water. Its leaves form a broad, rounded clump each growing season. The foliage dies back at the end of the season. Garden plants reach about 3 feet [0.91 metres] across. RHS gives an upper height and spread of 3.3 feet [1 metre].

The dark green leaves have a smooth, glossy surface. Each leaf has a heart-shaped base and a pointed tip. Wavy edges give the clump a loose, soft outline. The veins form deeper ribs as the leaves mature. Leaves can reach 0.75 feet [0.23 metres] long. Upright flower stems rise above the mound of leaves. These pale green stems bear burgundy spots and some leaves. Purple to violet, bell-shaped flowers open along the stems. Missouri Botanical Garden lists bloom from August to September. Flower stems can reach 3.2 feet [0.97 metres]. The blooms draw hummingbirds.

Grow this plant in part shade with moist, well-drained soil. Rich soil with added organic matter gives the best results. It also tolerates full shade and a broad soil range. Full sun suits it only where summers stay cool. Established plants can cope with some dry shade. Steady moisture during growth remains best for leaf quality. RHS lists acid or neutral soil and shelter from drying winds. Hardiness ratings are USDA zones 3–8 and RHS H7.

Use it in shady borders, woodland beds, or garden edges. Groups make ground cover, though plants take time to spread. A single clump also works as a specimen. Divide plants in early spring or late summer. Clear away dead leaves when growth ends for the year. Slugs and snails can chew large holes in the foliage. Vine weevil may trouble plants grown in pots. Other possible problems include viruses, leaf spots, and crown rot. Hail can tear leaves, while summer heat can scorch their edges.

Plants For A Future records cooked young leaves and leaf stalks as food. It also describes boiling the white stem section. The same source records root use for toothache. It lists no known hazards, but does not establish pet safety.