Tatary buckwheat Taichung selection Yu No. 19 (selected from Chiu-Chiang bitter Tatary buckwheat ) was used to study the influences of sowing date, sowing method and seeding rate on the agronomic and yield characteristics of buckwheat grown as a fall crop in Changhua area of Taiwan. Experimental results indicated that the optimal sowing time to produce the highest grain yield for the Tatary buckwheat was around October 25, which was about 10 days earlier than the conventional sowing time practiced by the farmers. Treatments of tillage-broadcasting and tillage-drill sowing methods showed the best yield performance. Although the yield of the minimum tillage-broadcasting sowing method was slightly lower than that of the tillage-broadcasting, it was more labor saving and therefore recommended. The optimal seeding rate was 40 kg/ha for Taichung selection Yu No. 19. The yield of this treatment (3,147 kg/ha) was 13.4% higher than that of the conventional practice (seeding rate of 60 kg/ha).