Irrigation is a very important factor as well as fertilization, affecting the growth and yield of plants. Coriander plants have several uses in pharmaceutical and food industries; because of its great importance, more investigations for improving the growth and productivity of this plant are still needed. The aim of this research is to study the effect of dry biogas fertilizer (dry digested biomass resulted from biogas digesters) and irrigation water regime conditions on the Coriander crop (Coriandrumsativum L.) production. The experimental work was conducted during November 2016 at Tractors and Farm machinery Testing & Research Station at Sabahia, Alexandria Governorate, Egypt. Results indicated high significant differences of mean values of the plant growth parameters for all treatments, while the highest significant difference resulted due to the effect of the treatment[irrigation water regime (15) times, depth from surface soil (10) cm and amount of biogas fertilizer (15) m3/Fed], where the values of plant height H, number of branches (NB), number of umbels (NF)andumbels diameter were 90.03 cm, 6.60, 80.30 and 4.3 respectively compared with the control treatment. Also the results of physical and chemical analysis of soil after harvesting showed high improvements, where the maximum mean values of total porosity, (T.P%), hydraulic conductivity (Kb Cm/h) , total nitrogen (T.N%) and available nitrogen (Av.N ppm) of soil after the coriander plant harvested, were 57.33 %, 3.17 Cm/h), 2.28% and 128.19 ppm respectively resulted from the treatment [irrigation water regime (15) times, depth from surface soil (10) cm and amount of biogas fertilizer (20) m3/Fed] compared with all treatments.