Abstract: The effects of different N doses and harvesting times on bulb yield and some plant characters of summer snowflake were studied in Samsun, Turkey ecological conditions for three years. First two year, planted bulbs were left to growth and in the third year at the beginning of vegetation, different N doses (0, 5, 10, 15 and 20 kg da-1) were applied in two times with 30 day interval at the same amount. Treated plants were harvested in June and July of 2002. According to the results, different harvesting time had no effect on parameters evaluated in this study, but increasing N doses resulted in an increase in bulb yield, bulb diameter, plant height, leaf number per plant and crude protein content of bulb.