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Investigation of bloom dates for individual flower in loquat fruit (Eriobotrya japonica Lindly cvs. ´Tsukumo´, ´Mogi´, and ´Tanaka´) was carried out to study the relationships among bloom dates and fruit set, cold injury or fruit quality. In air temperature during bloom period, -5.9℃ was lowest among low temperatures and followed by -5.4, -5.2, and -5.0℃ in bearing parts of crown in loquat orchard. Rate of bloom increased at initial time and then considerably decreased as the temperature decreased. Percent of fruit set and cold injury ranged of 0-64%, 0-30.8% in 3 loquat cultivar and these rate were significantly affected by bloom time regardless of cultivar. Fruit weight was significantly higher in fruits from early bloomed flower than that middle or late bloomed. Soluble solids and β-carotene contents slightly decreased as the bloom time delayed, but acidity slightly increased. Free sugars slightly decreased with bloom time and major sugars in flesh were fructose in ´Tsukumo´ or ´Mogi´ and sucrose in ´Tanaka´. Fruits from early bloomed flower were reduced cold injury and enhanced fruit weight and β-carotene content in loquat.
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