Convallaria keiskei

Convallaria keiskei is a perennial in the asparagus family, Asparagaceae. It is known as lily of the valley. Kew places its native range from southeastern Siberia to Japan. Plants For A Future lists a wider Asian range. This includes Mongolia, China, Korea, and northern Myanmar. It grows in temperate regions. In Japan, its habitats include uplands and mountain meadows.

The plant reaches about 1 foot [0.3 metres] tall. Its low growth suits ground cover beneath shrubs and trees. Flowers appear from April to May. Each flower has both male and female organs. Bees and flies pollinate them, and the species is self-fertile. Plants For A Future also records its value for bees. The supplied species records give no detailed leaf or fruit traits.

For garden growth, it prefers partial shade and moist woodland soil. The soil should drain well and have moderate fertility. Yet it tolerates a much wider range of sites. It can grow in deep shade or full sun. It also copes with dry shade beneath large trees. Sandy soil, loam, and heavy clay all suit it. It accepts mildly acid, neutral, and mildly alkaline soil. Reported moisture tolerance spans dry, moist, and wet ground. Plants For A Future lists USDA zones 3–7. It also reports survival at −20°C or below.

Woodland beds, shaded edges, and shrubberies offer places to use it. Plants For A Future also lists it for bog gardens. Its spread can become invasive once plants take hold. This warning matters despite the same source's negative weed flag. Rabbits appear to leave it alone, according to that source. Propagation is possible from seed or by September division. Seed can take two to twelve months or longer to sprout. Stored seed may be slow. Young seedlings need a long period of protected growth before planting out.

All parts are poisonous, so this is not a safe food recommendation. Plants For A Future records food uses alongside that warning. These include cooked greens, miso soup, and salted flowers or buds. It also records flowers mixed with leaf tea. Such use records do not establish safety. The source gives it a low edible-use score. It lists no known medicinal uses. Its clearest supported garden role is ornamental ground cover in shade.