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The growth responses of the Korean native Chinese chive (Allium tuberosum Rottl.) on varying regimes of temperature (15, 20, 25C) and daylength (9, 10, 11, 12h, natural daylength) were examined to get some information for the year-round culture and seed production. The yield of leaves were also compared with the protected cultivation. The range of optimum temperature for growth was between 20 and 25C, but the width and leaf area increased at 25C except ´Onyang´ and ´Kangjin´. In the protected cultivation, ´Milyang´, ´Taean´ and ´Iri´ produced high yield. Bolting was greatly inhibited by the shortdaylength below 12 hours while the length of flower stalk and the number of flowers per umbel decreased with further shortening of the daylength. Although some plants could have stalk elongation and flowering below 10 hour daylength or less, their seed formations were almost failed.
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