Abstract: Twenty-four lentil (Lens culinaris Medikus) genotypes were evaluated at two locations Armenia and Iran During the experimentation seasons (2010/2011), using a randomized complete blocks design with three replicates, the genotypes were tested for variation, performance and suitability for gr owi ng under t hese str ess ( Aut umn-s owi ng) and non-str ess (s pri ng -s own) envir onment s. Mean performance of all traits except number of branches/plant, number of pod and content were higher under Autumn-sowing than under spring-sown conditions. The result of this experiment showed that during wet season, where the temperature was as low as -7.2oC in the Chenaran and -14.1oC in the Hrrazdan. Many entries have shown various degrees of tolerance at different growth stages, but only 7 genotypes, MLC47, MLC44, MLC17, MLC15, MLC69, MLC83 and MLC16 are the bests yielding and most winter hardy.

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