The present study was carried out in two successive seasons (1999-2000 and 2000-2001) to investigate the effects of bio-, organic-, and chemical fertilization on Anethum graveolens L., Coriandrum sativum L., and Petroselinum sativum Mill. N, P, and K were added at the rate of 100+100+50 kg/feddan. It was added as one fourth or half of this quantity/feddan. While organic manure, as Farm Yard Manure, was used as 10m³/feddan. The used bio-fertilizers were Bacillus megatherium (P.D.B.), Azospirillum lipoferum and Azotobacter chroococcum. Almost all the applied treatments enhanced the plant growth of the three species in terms of plant height, fresh and dry weights, leaf area, and leaf/shoot ratio. However, the treatment with 10m³ of FYM plus bio-fertilizers proved to be the best one in this regard. With respect to the effects of the applied treatments on the chemical composition of the herb, the same treatment was superior in increasing the chlorophyll (a and b), vitamin C, N, P, and K contents of dill and coriander plants. On the other hand, parsley in some cases responded to the applied treatments in a different way.