An experiment was carried out to found the effect of polymer seed coatings (Genius coat 171, Genius coat 172, Arcus, Myconate and Quick roots) on physiological parameters of CORH 3 hybrid rice seeds at vegetative and reproductive stages under various moisture stress conditions viz., stress at panicle initiation stage, grain filling stage and both panicle initiation and grain filling stages. The results revealed that the seeds coated with Quick roots was found to be significantly superior in maintaining all the physiological parameters viz., leaf area index, relative water content, chlorophyll stability index, soluble protein content and nitrate reductase activity both under normal irrigation and moisture stress at various growth stages.