Studies were made with cowpea cv. CO5 to evaluate the influence of organic and inorganic seed priming treatments on seed invigoration and on seed yield under restricted irrigation condition. The inorganic and organic seed priming treatments includes soaking the seeds in solutions of 0.5 and 1.0% NaH2PO4 , 0.5 and 1.0% CaCl2, 0.5 and 1.0% FeSO4; 1.0 % fresh leaf extracts of arappu (Albizia amara), neem (Azadirachta indica), pungam (Pongamia pinnata) and prosopis (Prosopis juliflora) ,while water soaking and unprimed seeds served as check. The results revealed that among the inorganic nutrients, FeSO4 0.5 % increased the initial germination and the seed yield by 10 and 28 per cent respectively, while the organic seed priming with 1% Prosopis leaf extract enhanced the germination and seed yield by 6 and 25 per cent. On comparison the performance of organic and inorganic priming, were on par but higher than hydropriming and control seeds.