Abstract: Field trials were conducted to evaluate the effects of composts from feedstocks, chicken, swine and cattle manures on the yields and quality of Chinese flowering cabbage and cabbage. Study results showed that: (1) these composts applied at the same nitrogen rates did not result in significant differences in the yields of Chinese flowering cabbage and cabbage, but lower yields were observed when compared to the same nitrogen application rates of chemical fertilizer; (2) composts applied in combination with chemical fertilizer resulted in higher yields, but no significant differences were seen when compared to chemical fertilizer; (3) in general, applications of composts resulted in higher leaf concentrations of ascorbic acid (Vc) and soluble sugar, but lower leaf NO3–N concentrations, compared to application of chemical fertilizer, and composts in combination with chemical fertilizer. The results of this study indicates that basal applications of composts could significantly improve the quality of Chinese flowering cabbage and cabbage, but no significant effects were observed in reducing nitrate contents when composts were applied in combination with chemical nitrogen fertilizer.