An experiment was conducted in the field (practical crop production) at SGRR (P.G) COLLEGE to determine the effect of organic Mulch on the growth and yield of spinach. The experiment was conducted between the months of October and November, 2018. The experiment was a completely line sowing pattern (cropping pattern) with treated sewage mulch (TSM) and organic compost mulch (OCM) as treatments. The no mulch (NM L) was used as a control. Spinach seedlings were planted at a spacing of 15 cm within rows and 30 cm between rows. Weeding and pest control measures were done uniformly across the treatments, when and as required. The data collected included the percentage moisture retained by the different treatments on the soil, growth parameter’s (leaf width, leaf length, leaf number, leaf area, and plant height) and yield at harvest. The results displayed a significant difference (P<0.05) between the treatments in terms of\' the moisture retention. properties. Organic compost mulch recorded the highest mean percentage moisture retention (22.9%), followed by treated sewage mulch (20.9%) and no mulch recorded the lowest percentage moisture retention in the soil (14.4%). All the growth parameters were higher or spinach growth under TSM, followed by that grown under OCM. They were lowest under spinach grown under no mulch. The showed that mulching improved the performance of the spinach plants in terms of plant growth, moisture retention and yield.