Soil-water dynamics pattern in a lettuce cropping field under cotton mulch (CM), plastic mulch (PM), and zero mulch (C) coverage was identified. Three cultivation plots of 300 cm x 100 cm large were prepared. Soil-water content, electrical conductivity (EC) and temperature at 0-10 and 10-20 cm depth were hourly monitored. Soil-hydraulic conductivity (K_us) within each soil profile was characterized and modelled using van-Genuchten model. The soil with CM showed higher water content (0.29-0.33 cm³ cm^-3) than that with PM (0.29-0.31 cm³ cm^-3) and C (0.26 cm³ cm^-3). The soil EC with CM (0.22-0.30 dS m^-1 at rainfall rate of 32.1 mm d^-1) was higher than others (< 0.02 dS m^-1). The soil temperature with CM was respectively 2-3 and 4-5 ^oC lower than that with PM and C. Furthermore, the CM plot had higher K_us (3.1-4.4 cm d^-1) compared to the PM (0.18-0.21 cm d^-1) and C plot (0.36 cm d^-1). The results reflect a unique characteristic of the cotton mulch, which is able to provide sufficient water and nutrient availability, and to control weeds and temperature in soil profile for effective growth as well as sustainable production of the crop.