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The major characteristics of local strains of Allium grayi collected in Korea were investigated to obtain the basic information for varietal improvement and cultural practices. These strains could be classified into two different groups, such as early sprouting group and late sprouting group, based on the days to sprouting which ranged from 40 to 101 days. The sprouting of native collections was observed in both tetraploid and pentaploid before winter season and its leaves grow well. The leaf growth of local strains was better in earlier sprouting ones and the maximum plant growth in above-ground was reached at the early May. Seasonal increase in crop growth rate (CGR) of all local strains was much greater in after-winter season than that of before-winter season. The maximum CGR was shown at around late May and early June. The degree of CGR contribution in the early sprouting local strains was highest at the early March for roots, early April for leaf, and early May for leaf sheath but it was decreased rapidly thereafter. On the contrary, that in the late sprouting local strains was at the late March for roots, at the early April for leaves and leaf sheath, and at the middle May for bulbs, respectively. The collections were showed wide range of variation in their plant height, leaf width, leaf sheath height, leaf height, and flower stalk height. Growth type, number and formation site of bulblets were different in all local strains. Especially, the strains bearing flowering only produced more bulblets. The strains showed good above and under-ground growth were ´Anmyeondo´ in tetraploid and 6 strains including ´Yeongdong´ in pentaploid. These local strains were approved to have high bulbil yield potentials.
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