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Studies were conducted in an attempt to obtain the basic data for the development of Hanabusaya asiatica as horticultural plants. Habitat environment, ecological characteristics, various treatments for breaking seed dormancy, and morphological and flowering characteristics at different growth stages were investigated H. asiatica was distributed around areas of 850-1,400 m above the sea level with an inclination of 5-43°. The vegetation structure of H. asiatica was represented in groups as Quercus mongolica and H. asiatica. In a subgroup, Symplocos chinensis v. leucocarpa for. pilosa, Magnolia sieboldii and Acer mono were included. Indication species of Quexus mongolica and H. asiatica were Quercus mongolica (B₁ layer), Tilia amurensis (B₂ layer), Rhododendron schlippenbachii (S layer), Ainsliaea acerifolia v. subapoda, Athyrium nipponicum, Spuriopimpinella brachycarpa, Carex siderostica (K layer). Soil pH was about 5.4, and soil fertility was relatively in a good condition. The optimum conditions for seed germination was 25℃ in dark, and moist-chilling treatment for at least 30 days prior to sowing was prerequisite. Treatment of seeds with GA₃ 500 ppm resulted in the germination of more than 90%, indicating that GA₃ could replace the effect of moist-chilling treatment. One-year-old seedlings had no stem, possessing one to three leaves. After two years of growth they showed a typical morphology of H. asiatica having 5-6 leaves. There were differences in growth characteristics between cultivated and mountain-grown plants. Cultivating H. asiatica plants in alpine area 600 m above the sea level resulted in better growth chara cteristics than plants grown in flatland.
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