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The aim of the research was to study the adaptability of 13 needleleaved species and provenances under semi-arid and severe cold climate of Hamadan province of Iran on deep alluvial and light textured (Sandy loam) soils (pH= 7.65). The trail was conducted in 2001 under randomized complete blocks design and was harvested in 2005, using 13 treatments, including Juniperus virginiana, Thuja orientalis, four provenances of Pinus nigra, P.eldarica, P. sylvestris, two provenances of Cupressus arizonica, two provenances of Picea abies and Cedrus deodara at spacing of 3 × 3 m.The result showed that J.virginiana, B. orientalis, P. eldarica, P.sylvestris, C.arizonica andfour prevanances of P. nigra were the most adaptable species (>86% survival), whereas P.abies and C.deodora were the worst adaptable species (